Wilhelm Friedrich Ackermann was a German mathematician best known for the Ackermann function, an important example in the theory of computation.
Ackermann was awarded a Ph.D. in 1925 for a consistency proof of arithmetic apparently without full Peano induction (although it did use e.g. induction over the length of proofs).
In 1928, Ackermann helped David Hilbert turn his 1917 - 22 lectures on introductory mathematical logic into a text, Principles of Mathematical Logic. This text contained the first exposition ever of first-order logic, and posed the problem of its completeness and decidability. Ackermann went on to construct consistency proofs for set theory (1937), full arithmetic (1940), type-free logic (1952), and a new axiomatization of set theory (1956).
Wilhelm Heinrich Ackermann was born in 1789.
Wilhelm Heinrich Ackermann died in 1848.
Wilhelm Ackermann was born on 1896-03-29.
Wilhelm Ackermann died on 1962-12-24.
Ernst Christian Wilhelm Ackermann was born in 1761.
Ernst Christian Wilhelm Ackermann died in 1835.
contribute to math
Louise Ackermann has written: 'OEuvres de L. Ackermann'
Gabriel Ackermann is 6' 1".
Heide Ackermann is 165 cm.
Kathrin Ackermann is 172 cm.
Ronny Ackermann is 184 cm.