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Boreli Dejan
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Christian GoldbachBorn 18 Mar 1690; died 20 Nov 1764 at age 74.Russian mathematician whose contributions to number theory include Goldbach's conjecture, formulated in a letter to Leonhard Euler dated 7 Jul 1742. Stated in modern terms it proposes that: "Every even natural number greater than 2 is equal to the sum of two prime numbers." It has been checked by computer for vast numbers  up to at least 4 x 1014  but still remains unproved. Goldbach made another conjecture that every odd number is the sum of three primes, on which Vinogradov made progress in 1937. (It has been checked by computer for vast numbers, but remains unproved.) Goldbach also studied infinite sums, the theory of curves and the theory of equations.«[Image: Letter to Euler, in which Goldbach presented his conjecture.] 
A rookie pitcher was strugglin...
A rookie pitcher was struggling at the mound, so the catcher walked out to have a talk with him.
"I've figured out your problem," he told the young southpaw. "You always seem to lose control at the same point in every game."
"When is that?" asked the rookie.
"Right after the National Anthem."
"I've figured out your problem," he told the young southpaw. "You always seem to lose control at the same point in every game."
"When is that?" asked the rookie.
"Right after the National Anthem."