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2. Goldbach's weak conjecture - Wikipedia

   en.wikipedia.org/wiki/Goldbach's_weak_conjecture

   In number theory, Goldbach's weak conjecture, also known as the odd Goldbach conjecture, the ternary Goldbach problem, or the 3-primes problem, states that. Every odd number greater than 5 can be expressed as the sum of three primes. (A prime may be used more than once in the same sum.) This conjecture is called "weak" because if Goldbach's ...

3. Postage stamp problem - Wikipedia

   en.wikipedia.org/wiki/Postage_stamp_problem

   This problem can be solved by brute force search or backtracking with maximum time proportional to |V | m, where |V | is the number of distinct stamp values allowed. Therefore, if the capacity of the envelope m is fixed, it is a polynomial time problem. If the capacity m is arbitrary, the problem is known to be NP-hard. See also. Coin problem

4. 5 - Wikipedia

   en.wikipedia.org/wiki/5

   5 ( five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. The first Pythagorean triple. Five is the third-smallest prime number, [1] equal to the sum of the only consecutive positive integers to also be prime numbers ( 2 + 3 ).

5. List of African-American mathematicians - Wikipedia

   en.wikipedia.org/wiki/List_of_African-American...

   Optimal control problems with delay: 1966 (M) John Albert Ewell University of California, Los Angeles: On the determination of sets by sets of sums of fixed order: 1966 (M) Charles Edward Morris University of Illinois: Normal subgroups of the sympletic group on a countably infinite dimensional vector space: 1967 (F) Geraldine Claudette Darden

6. Goldbach's conjecture - Wikipedia

   en.wikipedia.org/wiki/Goldbach's_conjecture

   See Waring's problem and the related Waring–Goldbach problem on sums of powers of primes. Hardy and Littlewood listed as their Conjecture I: "Every large odd number (n > 5) is the sum of a prime and the double of a prime". This conjecture is known as Lemoine's conjecture and is also called Levy's conjecture.

7. Josephus problem - Wikipedia

   en.wikipedia.org/wiki/Josephus_problem

   In computer science and mathematics, the Josephus problem (or Josephus permutation) is a theoretical problem related to a certain counting-out game. Such games are used to pick out a person from a group, e.g. eeny, meeny, miny, moe . A drawing for the Josephus problem sequence for 500 people and skipping value of 6.