This thread is for mathematicians looking for challenges.

Rules for posting in this thread:

a) One open problem/conjecture per post (except very closely related problems)

b) Put a meaningful title together with a succeeding problem id into the post subject.

c) Every problem shall be stated clearly and basicly, if necessary by giving an introduction before and linking to relevant resources.

d) Avoid problems like: "find the best algorithm for ...", "investigate more on ...", "is there a connection between ...", etc. Make effort to culminate the problem in a yes/no question or conjecture.

e) If you found a proof or have a comment then dont post it here but open a new thread containing the string "TPID n" where n is replaced by the problem number. This way comments and proofs for a problem can by found by searching the forum for that string, while the problems thread stays clean and readable.

Rules for posting in this thread:

a) One open problem/conjecture per post (except very closely related problems)

b) Put a meaningful title together with a succeeding problem id into the post subject.

c) Every problem shall be stated clearly and basicly, if necessary by giving an introduction before and linking to relevant resources.

d) Avoid problems like: "find the best algorithm for ...", "investigate more on ...", "is there a connection between ...", etc. Make effort to culminate the problem in a yes/no question or conjecture.

e) If you found a proof or have a comment then dont post it here but open a new thread containing the string "TPID n" where n is replaced by the problem number. This way comments and proofs for a problem can by found by searching the forum for that string, while the problems thread stays clean and readable.