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  • 10 votes cast
Dec
14
revised Mathematical functions that can't be computed
deleted 428 characters in body
Dec
14
comment Mathematical functions that can't be computed
Hm, you are right, it is misleading - I remove it. The "busy beaver function" is a better example, like Qiaochu Yuan answered.
Dec
14
comment Mathematical functions that can't be computed
Your explanation has flaws: 1) Either programs can print the number π like this: "π" or "Pi". Or they cannot even print some rational numbers like 1/3 because of their infinite number of digits after the dot. 2) There do not exist numbers which definitely need an infinite description, because otherwise only undefinable infinite long formulas would be possible to evaluate to those numbers. 3) The Question is about functions and programs, not numbers and formulas that define numbers.
Dec
14
answered Mathematical functions that can't be computed
Nov
24
revised Mathematical difference between white and black notes in a piano
added 13 characters in body
Nov
24
awarded  Teacher
Nov
24
revised Mathematical difference between white and black notes in a piano
added 6 characters in body
Nov
24
answered Mathematical difference between white and black notes in a piano
Nov
10
revised Looking for a bijective, discrete function that behaves as chaotically as possible
added 208 characters in body
Nov
10
revised Looking for a bijective, discrete function that behaves as chaotically as possible
added 1943 characters in body
Nov
10
comment Looking for a bijective, discrete function that behaves as chaotically as possible
Jep, did think about that last night. I'll fix this...
Nov
9
answered Looking for a bijective, discrete function that behaves as chaotically as possible
Nov
9
awarded  Editor
Nov
7
awarded  Supporter
Nov
7
comment Isomorphism between [0,1] to (0,1)
@user3224: an Isomorphism is a special Homomorphism, which is a structure-preserving map between two algebraic structures. so, what is the structure on those sets? or do you only want any bijective map?