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In mathematics, Shephard's problem, is the following geometrical question asked by Geoffrey Colin Shephard in 1964: if K and L are centrally symmetric
Shephard's_problem
tied into it? Does every convex polyhedron have Rupert's property? Shephard's problem (a.k.a. Dürer's conjecture) – does every convex polyhedron have a
List of unsolved problems in mathematics
List_of_unsolved_problems_in_mathematics
Family name
artist Sidney Shephard (1894–1953), British politician Shephard Mayer (1923–2005), Canadian ice hockey player Shephard's lemma Shephard's problem Chevalley–Shephard–Todd
Shepherd_(name)
British mathematician (1927–2016)
He asked Shephard's problem on the volumes of projected convex bodies, posed another problem on polyhedral nets, proved the Shephard–Todd theorem in invariant
Geoffrey_Colin_Shephard
On surrounding polygons by layers of copies
corresponding problem in the hyperbolic plane, the Heesch number may be arbitrarily large. Heesch (1968), as cited by Grünbaum & Shephard (1987) and Fontaine
Heesch's_problem
and Schneider (1967) used projection bodies in their solution to Shephard's problem. For K {\displaystyle K} a convex body, let Π ∘ K {\displaystyle \Pi
Projection_body
Problem in convex geometry
Schlumprecht (1999) gave a uniform solution for all dimensions. Shephard's problem Ball, Keith (1988), "Some remarks on the geometry of convex sets"
Busemann–Petty_problem
Square tiles with a color on each edge
halting problem (the problem of testing whether a Turing machine eventually halts) then implies the undecidability of Wang's tiling problem. Combining
Wang_tile
Edge-joined polygons which fold into a polyhedron
Unsolved problem in mathematics Does every convex polyhedron have a simple edge unfolding? More unsolved problems in mathematics In 1975, G. C. Shephard asked
Net_(polyhedron)
German breed of dog
also recommends testing for haemophilia and hip dysplasia, other common problems with the breed. German Shepherds have been featured in a wide range of
German_Shepherd
American breed of dog
noted by owners were eye problems (red eye, epiphora, conjunctivitis, and cataracts). Dermatological and respiratory problems also ranked high. The Australian
Australian_Shepherd
Lemma
Shephard's lemma is a result in microeconomics having applications in the theory of the firm and in consumer choice. The lemma states that if indifference
Shephard's_lemma
German mathematician
of Salzburg in 2004. Rolf Schneider is known for his solution of Shephard's problem, his books on stochastic and integral geometry in long-standing collaboration
Rolf_Schneider
Existence of a line through two points
all of them. It is named after James Joseph Sylvester, who posed it as a problem in 1893, and Tibor Gallai, who published one of the first proofs of this
Sylvester–Gallai_theorem
economics that describes the Minkowski addition of sets in a vector space Shephard's problem - a geometrical question Simplex - a generalization of the notion
List_of_convexity_topics
Covering by shapes without overlaps or gaps
if, the Turing machine does not halt. Since the halting problem is undecidable, the problem of deciding whether a Wang domino set can tile the plane
Tessellation
Mathematical problem
Squaring the square is the problem of tiling an integral square using only other integral squares. (An integral square is a square whose sides have integer
Squaring_the_square
Association football club in London, England
their relegation from the top-flight in 1998. This was due to financial problems which saw Palace go into administration twice, in 1999 and 2010. They steadily
Crystal_Palace_F.C.
Mathematics book
patterns is a book by mathematicians Branko Grünbaum and Geoffrey Colin Shephard published in 1987 by W.H. Freeman. The book was 10 years in development
Tilings_and_patterns
American reality television series
season 3, Sardinia (Italy) in season 4 and Ibiza (Spain) in season 5. Glenn Shephard — Captain Byron Hissey — Chief Engineer Paget Berry — First Officer Adam
Below_Deck_Sailing_Yacht
Political party in the United States
ISBN 978-0190086350. Smith, Jordan Michael; Logis, Rich; Logis, Rich; Shephard, Alex; Shephard, Alex; Kipnis, Laura; Kipnis, Laura; Haas, Lidija; Haas, Lidija
Republican Party (United States)
Republican_Party_(United_States)
American street artist and activist (born 1970)
artists. O'Donoghue later posted an article, titled "Shepard Fairey’s Image Problem", on several independent media sites. O' Donoghue explored Fairey's use
Shepard_Fairey
1999 video game
Hazardous Environment Combat Unit (HECU). The player character, Adrian Shephard, is sent in to neutralize the Black Mesa Research Facility when a scientific
Half-Life:_Opposing_Force
Generalization of a polytope in real space
polytope the symmetry group (here a complex reflection group, called a Shephard group) acts transitively on the flags, that is, on the nested sequences
Complex_polytope
British crime drama television series (2014–2023)
what local police in the Calder Valley call the area because of its drug problem. In the first episode of series one, Ryan points out to Catherine, visiting
Happy_Valley_(TV_series)
Mathematical spiral tiling
with Form eines Neunecks eine Lösung zu einem Problem von Reinhardt ["On a nonagon as a solution to a problem of Reinhardt"]. Voderberg tiling is monohedral
Voderberg_tiling
Geometry problem on tiling by hypercubes
higher dimensions. The proofs of these results use a reformulation of the problem in terms of the clique number of certain graphs now known as Keller graphs
Keller's_conjecture
Tool for managing livestock
route. This variant, which has a prevalence of about 5%, imposes technical problems in angioplasty procedures. The letter lamed originated as a representation
Shepherd's_crook
American television series (2004–2010)
on what seems to be an uninhabited tropical island. Spinal surgeon Jack Shephard becomes their leader. Their survival is threatened by a number of mysterious
Lost_(TV_series)
States of matter for water as a solid
lattice points, but the hydrogen atoms are located on the lattice edges. The problem is to pick one end of each lattice edge for the hydrogen to bond to, in
Phases_of_ice
Family of multi-role combat aircraft
Fish, Tim (16 July 2014). "Farnborough: Tornado will go out in style". Shephard Media. "Libya: UK planes to be deployed." BBC News, 18 April 2011. "Libya:
Panavia_Tornado
Natural number
Millennium Prize Problems are seven problems in mathematics that were stated by the Clay Mathematics Institute in 2000. Currently, six of the problems remain unsolved
7
2011 American science fiction crime drama television series
privacy and "the greater good", the concept of justifiable homicide, and problems caused by working with limited information programs. Person of Interest
Person of Interest (TV series)
Person_of_Interest_(TV_series)
American actor and director (b.1943)
Year Title Role Notes 1967 Dragnet 1967 Billy Jones Episode: "The Big Problem" 1968 Judd, for the Defense Harry Crews Episode: "The Ends of Justice" 1968
Georg_Stanford_Brown
which causes viewership to decrease, though clarified that he has "no problem with a comic book movie". As a solution to the lack of "investment in the
Cinema_of_the_United_States
British television series
May 2020. Retrieved 13 April 2020. Busby, Mattha (18 July 2018). "The problem with Love Island – by the people who turned it down". The Guardian. Archived
Love_Island_(2015_TV_series)
Series of SUV models
Designer, Dies at 85". The New York Times. Retrieved 23 February 2016. Shephard, Dave. "The History of the Range Rover Marque". Archived from the original
Range_Rover
"DSA 2022: Malaysian UNIFIL contingent to receive Ejder Yalçin 4x4s | Shephard". "Malaysian Defence - The More The Merrier". "Appreciation Parade for
List of equipment of the Malaysian Army
List_of_equipment_of_the_Malaysian_Army
Non-periodic tiling of the plane
colored edges, now known as Wang dominoes or tiles, and posed the "Domino Problem": to determine whether a given set of Wang dominoes could tile the plane
Penrose_tiling
System that relates geologic strata to time
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Special Publications, Geological Society of London. 190
Geologic_time_scale
Variety. Retrieved May 13, 2026. Bitran, Tara (May 31, 2024). "3 Body Problem Will Return For Seasons 2 and 3". Tudum. Archived from the original on
List of Netflix original programming
List_of_Netflix_original_programming
Israeli military technology company
DA-Group to offer GNSS immune technology – DB – Digital Battlespace – Shephard Media". www.shephardmedia.com. Retrieved November 19, 2019. Fortin, Matt
Elbit_Systems
American cable television news channel
original on November 15, 2019. Retrieved January 18, 2021. Shephard, Alex (August 6, 2020). "The Problem With MSNBC Isn't That It's Too Liberal". The New Republic
MS_NOW
Fictional character in the Overwatch franchise
design she felt like another model off an assembly line. While Kenneth Shephard of Kotaku shared similar complaints to other outlets and fans in how Blizzard
Shion_(Overwatch)
American college football season
Retrieved December 3, 2025. Antonik, John (November 1, 2025). "Houston Had a Problem". wvusports.com. West Virginia University. Retrieved December 3, 2025.
2025 NCAA Division I FBS football season
2025_NCAA_Division_I_FBS_football_season
Ian; Nanji, Noor (16 February 2024). "This Morning: Cat Deeley and Ben Shephard replace Holly Willoughby and Phillip Schofield". BBC News. BBC. Retrieved
2024_in_British_television
American actor (born 1962)
manosphere. In 2004, McCarthy announced that he once had a serious alcohol problem, which began at age 12. He entered a detoxification program in 1992, and
Andrew_McCarthy
English media personality, actress and singer (born 1971)
series Hearts and Bones with Damian Lewis, the Jonathan Creek episode "The Problem at Gallowes Gate", and a Boxing Day special Agatha Christie's Marple episode
Amanda_Holden
American businessman and philanthropist (born 1955)
existential threat to civilization, stating that while it remains a serious problem, it was more important to give money to other causes such as solving poverty
Bill_Gates
Earth Band 48 February 6, 2000 Stroud, Gloucestershire, England Liver problems Dave Peverett Foghat 56 February 7, 2000 Orlando, Florida, U.S. Renal cancer
List of 2000s deaths in popular music
List_of_2000s_deaths_in_popular_music
American magazine
decision to publish a controversial op-ed by Dale Peck called "My Mayor Pete Problem." The op-ed was retracted, with Lehmann commenting in a separate statement:
The_New_Republic
Prime Minister of the United Kingdom from 2016 to 2019
about "a few bad apples". The problem might lie with a minority of officers, but it is still a significant problem and a problem that needs to be addressed
Theresa_May
Canadian woman convicted of manslaughter and ex-wife of Paul Bernardo (born 1970)
80 km northeast of Montreal. In 1999, Toronto Star reporter Michelle Shephard came into possession of copies of her application to transfer to the Maison
Karla_Homolka
American politician (born 1969)
2022. Shephard, Alex; Bacharach, Jacob; Bacharach, Jacob; Shiner, Meredith; Shiner, Meredith; Linkins, Jason; Linkins, Jason; Shephard, Alex; Shephard, Alex
John_Fetterman
2023 maritime disaster
Adrienne Mahsa; Aronoff, Kate; Otten, Tori; Shephard, Alex; Otten, Tori; Otten, Tori; Otten, Tori; Shephard, Alex (1 November 2022). "Missing Titanic Sub
Titan_submersible_implosion
Huey family of American military utility helicopters
control system. The four-member flight crew attempted to deal with the problem, but due to the very low altitude, the incident resulted in a crash.
Bell_UH-1_Iroquois
Major event in the run-up to the 2024 United states presidential election
18, 2024. Retrieved July 16, 2024. Bidgood, Jess (July 1, 2024). "The Problem in Plain Sight". The New York Times. Retrieved March 22, 2025. Garrison
Withdrawal of Joe Biden from the 2024 United States presidential election
Withdrawal_of_Joe_Biden_from_the_2024_United_States_presidential_election
becoming more political and less outrageous." Also, due to serious health problems, Michael Dunn appeared as Dr. Loveless in only one episode during this
List of The Wild Wild West episodes
List_of_The_Wild_Wild_West_episodes
Proposed method of financing higher education
with several other LSE economists. In 1968, Glennerster had identified problems with the higher education system which was at that time funded almost exclusively
Graduate_tax
Family of interceptor and reconnaissance aircraft
wartime and was studied on both sides of the Iron Curtain. The perennial problem with engines dedicated to vertical lift is they become mere dead weight
Mikoyan-Gurevich_MiG-25
American political commentator (born 1961)
and reflects the irresistible temptation to attribute African American problems to a history of white racist oppression." A reviewer for The Journal of
Dinesh_D'Souza
2007 video game
Portal "makes physics, math, logic, spatial reasoning, probability, and problem-solving interesting, cool, and fun", a necessary feature to draw children
Portal_(video_game)
American actress (born 1980)
beautiful, and people seem like they don't have any problems, but everyone's human. Everyone has problems. Everyone feels yucky on the inside sometimes."
Kristen_Bell
Skynyrd fan who first appeared in Mike Judge's animated short "The Honky Problem." He has a major role in "Way Down Mexico Way" as a drug mule and has cameos
List of Beavis and Butt-Head characters
List_of_Beavis_and_Butt-Head_characters
Electric guitar shape
has been converted to hard-tail ("blocked"), which has solved the tuning problem and also improved tuning stability and provided even more sustain. Rosa
Star_(guitar)
Fictional character of the TV series Lost
past as a research specialist recruited to solve the Island's fertility problem where pregnant women die after conception. Prevented from leaving the Island
Juliet_Burke
Expand description
assault and pay a small fine so he can avoid jail time. This becomes a problem when the shoving victim later goes into a coma and dies. Benny asks Bull
List of Bull (2016 TV series) episodes
List_of_Bull_(2016_TV_series)_episodes
American online newsletter platform
publication of extremist views because attempting to censor them would make the problem worse. Creators like Casey Newton, Molly White, and Ryan Broderick left
Substack
Educational curriculum used in England since 1988
as an opportunity to promote cultural and moral values. Under Gillian Shephard's tenure as Education Secretary, a review of the National Curriculum was
National Curriculum for England
National_Curriculum_for_England
Convex polyhedron property
determine whether a given polyhedron is equiprojective. Shephard, G. C. (1968). "Twenty Problems on Convex Polyhedra: Part I". The Mathematical Gazette
Equiprojective_polyhedra
Type of rotorcraft
maintaining steady flight with a crosswind presents an additional flight control problem, where strong crosswinds from certain angles will increase or decrease
Helicopter
2014 book by Yuval Harari
review: 'urgent questions'". The Telegraph. Retrieved 29 October 2014. Ben Shephard. Sapiens: A Brief History of Humankind review – thrilling story, dark message
Sapiens: A Brief History of Humankind
Sapiens:_A_Brief_History_of_Humankind
American battle rifle
adversely affecting accuracy. Fiberglass stocks were produced to resolve this problem, but the rifle was discontinued before the fiberglass stocks could be distributed
M14_rifle
paid $62 million to resolve conflict over Azteca Stadium boxes, but the problem persists". Expansión. Retrieved June 9, 2026. "Revés a dueños de palcos
List of 2026 FIFA World Cup controversies
List_of_2026_FIFA_World_Cup_controversies
"Supporting roles – why forward repair systems are an in-demand capability | Shephard". plus.shephardmedia.com. Retrieved 31 January 2025. "FRSN – FORWARD REPAIR
List of equipment of the Royal Danish Army
List_of_equipment_of_the_Royal_Danish_Army
appropriately accounting for the Birthdate Problem, and discuss the implications of the Birthdate Problem for the debate over double voting and the means
Electoral fraud in the United States
Electoral_fraud_in_the_United_States
Bohdana Howitzer: 30 Units in Service, None Destroyed, and the "Positive Problem" With the Chassis | Defense Express". en.defence-ua.com. Retrieved 2024-02-20
List of wheeled self-propelled howitzers
List_of_wheeled_self-propelled_howitzers
former Cabinet ministers Estelle Morris, Paul Boateng, Chris Smith, Gillian Shephard, Virginia Bottomley and Michael Portillo; the Father of the House of Commons
2005 United Kingdom general election
2005_United_Kingdom_general_election
American defense technology company
products are used for reconnaissance in close-quarters combat and solving problems like room-clearing and fatal funnel. Nova is an autonomous quadcopter drone
Shield_AI
Difesa. Retrieved 19 August 2025. "The Italian Army's ambitious IFV plan | Shephard". www.shephardmedia.com. Retrieved 2024-06-14. Technologies, Italian Defence
List of equipment of the Italian Army
List_of_equipment_of_the_Italian_Army
American actress (1946–2025)
2025. James, Caryn (September 1, 1990). "Review/Film; Cat Lover With a Problem: Asthma". The New York Times. Archived from the original on December 11
Diane_Keaton
Polyhedron which tiles 3D space
tile space (such as various polycubes). Hilbert's eighteenth problem, one of Hilbert's problems, consisting of three subproblems, one of which is a three-dimensional
Space-filling_polyhedron
Shape bounded by non-intersecting line segments
Simple polygons are commonly seen as the input to computational geometry problems, including point in polygon testing, area computation, the convex hull
Simple_polygon
Cased telescoped autocannon
early life. As of 2024, modifications to the software solved most of the problems. The Jaguar has been capable to shoot in movement since the standard R2
40CT_cannon
American maritime patrol aircraft
February 2021. "Canada orders 14 Poseidon P-8A maritime patrol aircraft | Shephard". www.shephardmedia.com. Retrieved 16 June 2024. "Boeing: Orders and Deliveries
Boeing_P-8_Poseidon
Natural number
Sloane, N. J. A. (ed.). "Sequence A003432 (Hadamard maximal determinant problem: largest determinant of a (real) {0,1}-matrix of order n.)". The On-Line
32_(number)
Pictures with The Learning Channel (TLC) 22 December Moscow, We Have a Problem, about the Mir EO-23 collision in 1997; Mir had a fire on 24 February 1997;
List_of_Equinox_episodes
Fictional character from Pikmin 4
the game, the Rescue Corps sends out a team with Oatchi led by Captain Shephard, tasked with rescuing series protagonist Captain Olimar from the planet
Oatchi
Transport aircraft family by Dornier
February 2016). "Singapore Airshow: Dornier 228 production ramps uu". Shephard Media. Retrieved 1 June 2017. Batey, Angus (15 June 2015). "RUAG, Dornier
Dornier_228
Season of television series
served as Ally's love interest during the season, but due to the actor's problem with drug addiction, he was written out. The show's season finale was titled
Ally_McBeal_season_4
American lawyer and politician (born 1957)
by moderate Republicans who run the Senate! Their problem is not me and the Democrats; their problem is themselves. Who are they? Are they these extreme
Andrew_Cuomo
Christian monastic denomination
James Whittaker, father and son John Hocknell and Richard Hocknell, James Shephard, and Mary Partington traveled to colonial America and landed in New York
Shakers
Chinese stealth fighter aircraft
original on 9 July 2021. Retrieved 8 July 2021. Axe, David (3 January 2019). "Problem: China's J-20 Stealth Fighter Doesn't Have a Gun". The National Interest
Chengdu_J-20
show in São Paulo, Brazil at Via Funchal was canceled due Duff's throat problems. Hilary played in the same city and in the same venue two years later with
List of Hilary Duff concert tours
List_of_Hilary_Duff_concert_tours
Measure of leanness (corpulence) of a person
yields valid results even for very short and very tall persons, which is a problem with BMI — for example, an ideal body weight for a person 152.4 cm tall
Corpulence_index
Flat-sided three-dimensional shape
characteristics and the solution for the Seven Bridges of Königsberg's problem, underlying the field of topology. Johannes Kepler discovered two non-convex
Polyhedron
Used to define marginal product and to distinguish allocative efficiency
of many outputs and many inputs, researchers often use the so-called Shephard's distance functions or, alternatively, directional distance functions,
Production_function
Largest Civilian Rotorcraft Manufactured by Airbus Helicopters
H225 Super Puma helicopters. On 25 October 2012 it was announced that the problem was suspected to relate to the main gearbox vertical shaft; the AS 332
Eurocopter_EC225_Super_Puma
Private liberal arts university in Austin, Texas
announced in October of 2021, billed as a new institution that could address problems in higher education. The announcement was met with significant media attention
University_of_Austin
Islands (Disputed between Vanuatu and France so it could be in here or not) Shephard Islands Torres Islands Caroline Islands Faichuk Islands Nomiwisofo Group
List_of_archipelagos
SHEPHARDS PROBLEM
SHEPHARDS PROBLEM
Boy/Male
British, English, Jamaican
Shepherd
Boy/Male
Muslim
Shepherd
Boy/Male
Hindu
Delightful
Boy/Male
English
Shepherd
Surname or Lastname
English
English : variant spelling of Shepherd.Americanized form of some Jewish surname sounding like or meaning ‘shepherd’.
Surname or Lastname
English
English : variant spelling of Shepherd.
Boy/Male
American, Anglo, British, English
Shepherd
Boy/Male
Latin
Shepherd.
Boy/Male
Irish
Shepherd.
Boy/Male
English
Shepherd.
Boy/Male
British, English
Shepherd
Boy/Male
Anglo, British, English
Shepherd
Surname or Lastname
English
English : variant spelling of Shepherd.
Boy/Male
British, English
Shepherd
Boy/Male
Australian, British, English
Shepherd
Boy/Male
Basque
Shepherd.
Surname or Lastname
English
English : from Middle English schepherde ‘shepherd’ (composed of words meaning ‘sheep’ + ‘herdsman’ or ‘guardian’), hence an occupational name for a shepherd. This English form of the name has absorbed cognates and equivalents from several other languages (for forms, see Hanks and Hodges 1988).
Boy/Male
Hindu, Indian
Charming; Delightful
Boy/Male
American, British, English
Shepherd
Surname or Lastname
English
English : variant spelling of Shepherd.
SHEPHARDS PROBLEM
SHEPHARDS PROBLEM
Male
Japanese
(信行) Japanese name NOBUYUKI means "faithful happiness."
Boy/Male
Indian, Sanskrit
Lord of Citra; Wonderful Lord; Moon
Girl/Female
Arabic, Muslim
Justified
Boy/Male
Hindu
Boy/Male
Spanish
God has helped.
Boy/Male
Indian
Good
Surname or Lastname
English (chiefly East Anglia)
English (chiefly East Anglia) : from the Middle English female personal name Aldus, a pet form of any of the numerous Old English personal names formed with a first element (e)ald ‘old’.Nathan Aldis (originally Aldus) came from eastern England to Dedham, MA, in 1638.
Boy/Male
Arabic
Bitter
Girl/Female
Indian
Name of a Raga
Boy/Male
Hindu, Indian, Punjabi, Sikh
Jewel
SHEPHARDS PROBLEM
SHEPHARDS PROBLEM
SHEPHARDS PROBLEM
SHEPHARDS PROBLEM
SHEPHARDS PROBLEM
n.
A man employed in tending, feeding, and guarding sheep, esp. a flock grazing at large.
n.
The god of shepherds, guardian of bees, and patron of fishing and hunting. He is usually represented as having the head and trunk of a man, with the legs, horns, and tail of a goat, and as playing on the shepherd's pipe, which he is said to have invented.
a.
Of or pertaining to shepherds; hence, relating to rural life and scenes; as, a pastoral life.
n.
Resembling a shepherd; suiting a shepherd; pastoral.
n.
A little shepherd.
a.
Resembling, or becoming to, a shepherd; pastoral; rustic.
n.
The conductir of a mule team; also, a head shepherd.
imp. & p. p.
of Shepherd
n.
A silicle, or short pod, as of the shepherd's purse.
n.
A gray plaid; -- used by shepherds in Scotland.
a.
Of or pertaining to the life and occupation of a shepherd; pastoral; rustic.
p. pr. & vb. n.
of Shepherd
v. t.
To tend as a shepherd; to guard, herd, lead, or drive, as a shepherd.
n.
A shepherd; one who has the care of flocks and herds.
p. p. & a.
Clothed; arrayed; dressed; as, he was habited like a shepherd.
n.
A poem describing the life and manners of shepherds; a poem in which the speakers assume the character of shepherds; an idyl; a bucolic.
n.
A hook fastened to pole, by which shepherds lay hold on the legs or necks of their sheep; a shepherd's crook.
v. i.
To act as a herdsman or a shepherd.
n.
A hut or shelter for shepherds of fishers. See Sheeling.
n.
The pastor of a church; one with the religious guidance of others.