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Any proof is relative, since it is based on certain unprovable assumptions.
¡¶Encyclopaedia of Mathematics¡·£¬http://eom.springer.de/p/p075420.htm

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Based the "The definition of Proof  http://eom.springer.de/P/p075420.htm,
the Mathematical proofs of a proposition should have three cases:
(1) the proposition is valid, under a certain axiomatic system;
(2) the proposition is not valid, under another axiomatic system;
(3) the proposition can not be proved, without the necessary designating axiomatic systems.

Under these criterions, GRIGORI PERELMAN only did the 1/3 of the full proofs of Poincare conjecture.

Çë¶ÔÕÕGodel incompleteness theoremºÍChaitin theorem¡£

_____________________________________________________________________

What is a "Full Proof"


"Proof is a reasoning conducted according to certain rules in order to demonstrate some proposition (statement, theorem); it is based on initial statements (axioms). In practice, however, it may also be based on previously demonstrated propositions. Any proof is relative, since it is based on certain unprovable assumptions." [1]

So, a proposition proved can have three results:
according to different rules, the proposition can be (1) valid/proved; (2) invalid; and (3) undecidable.
  
The Mathematical proofs of a proposition must give the following three cases:
(1) The proposition is valid, under some certain axiomatic systems;
(2) The proposition is not valid, under other axiomatic systems;
(3) The proposition can not be proved/decided, without the necessary designating axiomatic systems.
A Full Proof requires that the three cases are all identified definitely.
  
This is the use of Gödel incompleteness theorem and Chaitin theorems in the criterion for Future Mathematical Proof.
  
Under these criterions, GRIGORI PERELMAN only did the 1/3 of the full proofs of Poincare conjecture.

References:
[1] Proof in Encyclopaedia of Mathematics, http://eom.springer.de/p/p075420.htm
[2] Continuum hypothesis in Encyclopaedia of Mathematics, http://eom.springer.de/C/c025790.htm
[3] Gregory J. Chaitin. Information-Theoretic Computational Complexity. IEEE Transactions on Information Theory, IT-20 (1974), pp. 10-15.
[4] Gödel incompleteness theorem in Encyclopaedia of Mathematics, http://eom.springer.de/G/g044530.htm
[5] Morris Kline. Mathematical Thought from Ancient to Modern Times, New York: Oxford University Press, 1972.
[6] Hilbert's Program in Stanford Encyclopedia of Philosophy, http://plato.stanford.edu/entries/hilbert-program/
[7] http://bbs.sciencenet.cn/showtopic-83926.aspx

[ Last edited by YANGZL on 2011-9-30 at 10:28 ]
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