Open Problems


Open Problem Garden–created by Matt DeVos and Robert Šámal


Egres Open –maintained by András Frank


Open Problems – Graph Theory and Combinatorics–collected and maintained by Douglas B. West


Erdös’ Problems on Graphs–collected and maintained by Fan Chung Graham and Ron Graham

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Problem Collections of Erdös

List of Conjectures by Paul Erdös–Wiki


Open Problems for Undergraduates–maintained by Robert Hochberg

List of unsolved problems in computer science–Wiki


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