Category

Mathematical problems

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Seven Bridges of Königsberg

mathematical problem

Monty Hall problem

mathematical problem

birthday problem

mathematical problem

halting problem

problem of determining whether a given program will finish running or continue forever

sequence of moves of a knight on a chessboard to visit each square exactly once

mathematical problem

Eight queens puzzle

mathematical chess problem of placing eight chess queens on an 8×8 chessboard so that no two queens threaten each other

Waring's problem

problem in number theory

boundary value problem

differential equation together with a set of additional constraints (boundary conditions)

stable marriage problem

mathematical problem of finding a stable matching between two equally sized sets of elements given an ordering of preferences for each element

mathematical problem

problem that can be possibly solved via mathematics

mathematical problem

Josephus problem

mathematical counting-out question

Happy Ending problem

problem about proving that five points in the plane will have a subset forming the vertices of a convex quadrilateral

squaring the square

mathematical problem of tiling an integral square using only other integral squares

Dirichlet problem

problem of finding a function which solves a specified partial differential equation with prescribed boundary values

Hadwiger–Nelson problem

mathematical problem

Tarski's circle-squaring problem

mathematical problem

minimum-cost flow problem

mathematical optimization problem

clock angle problem

Mathematical question

dissection problem

the problem of partitioning a given shape into pieces that can be rearranged to form a second given shape

Napoleon's problem

given a circle and its centre, the problem of dividing the circle into four equal arcs using only a compass

block-stacking problem

mathematical problem

Plateau's problem

in calculus of variations, the problem proving the existence of a minimal surface with a given boundary

Illumination problem

mathematical problem

napkin ring problem

problem in geometry

problem in differential geometry

Znám's problem

the problem of finding sets of integers in which each is a proper divisor of one plus the product of the others

Alhazen's problem

mathematical problem in geometrical optics

trying to map moments to a measure that generates them

Cheryl's Birthday

a variant of the classic Birthday problem

dining cryptographers problem

protocol for secure multi-party computation of the boolean-OR function

Cramer-Castillon's problem

Boolean Pythagorean triples problem

mathematical problem

square trisection

Kirkman's schoolgirl problem

mathematical problem

Regiomontanus' angle maximization problem

famous mathematical optimization problem

Schoenflies problem

problem in geometric topology

zero-sum problem

mathematical problem

Kuratowski's closure-complement problem

theorem that the monoid generated by taking closures and complements of a given set in a topological space has size at most 14, attained by e.g. the set (0, 1) ∪ (1, 2) ∪ {3} ∪ ([4, 5] ∩ ℚ) of reals

Oberwolfach problem

Unsolved problem of discrete mathematics

Newton–Pepys problem

probability problem

No-three-in-line problem

topic in discrete geometry

Orchard-planting problem

geometry; how many 3-point lines can n points form

Behrens–Fisher problem

mathematical problem

firing squad synchronization problem

problem in computer science and cellular automata