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  2. List of NP-complete problems - Wikipedia

    en.wikipedia.org/wiki/List_of_NP-complete_problems

    Dominating set, a.k.a. domination number [3]: GT2 NP-complete special cases include the edge dominating set problem, i.e., the dominating set problem in line graphs. NP-complete variants include the connected dominating set problem and the maximum leaf spanning tree problem. [3]: ND2 Feedback vertex set [2] [3]: GT7

  3. Class number problem - Wikipedia

    en.wikipedia.org/wiki/Class_number_problem

    Gauss class number problem (low class number lists) For given low class number (such as 1, 2, and 3), Gauss gives lists of imaginary quadratic fields with the given class number and believes them to be complete.

  4. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    Goldbach’s Conjecture. One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes ...

  5. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    As an example, 9 780 657 631 has 1132 ... numbers will always lead to a smaller number after a certain number of iterations: for example, ... Collatz problem is the ...

  6. Partition problem - Wikipedia

    en.wikipedia.org/wiki/Partition_problem

    The problem is known to undergo a "phase transition"; being likely for some sets and unlikely for others. If m is the number of bits needed to express any number in the set and n is the size of the set then / < tends to have many solutions and / > tends to have few or no solutions. As n and m get larger, the probability of a perfect partition ...

  7. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The other six Millennium Prize Problems remain unsolved, despite a large number of unsatisfactory proofs by both amateur and professional mathematicians. Andrew Wiles , as part of the Clay Institute's scientific advisory board, hoped that the choice of US$ 1 million prize money would popularize, among general audiences, both the selected ...

  8. Congruent number problem - Wikipedia

    en.wikipedia.org/wiki/Congruent_number

    For example, 5 is a congruent number because it is the area of a (20/3, 3/2, 41/6) triangle. ... Unsolved Problems in Number Theory, Problem Books in Mathematics ...

  9. List of number theory topics - Wikipedia

    en.wikipedia.org/wiki/List_of_number_theory_topics

    5 Analytic number theory: additive problems. 6 Algebraic number theory. 7 Quadratic forms. 8 L-functions. 9 Diophantine equations. 10 Diophantine approximation. 11 ...