| Change log entry 45063 | |
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| Processed by: | richwarm (2012-12-20 02:57:54 UTC) |
| Comment: |
<< review queue entry 43963 - submitted by 'alanwatson' >> 'one-to-one function' is not correct. The original 'one-to-one map between sets in math.' was ok, if not very precise, but your simpler version is misleading. For example a function can map a triplet so long as the set of all possible x,y,z and the set of values that they are mapped onto are the same. eg y=2x is an injection because y can range from -infinity to + infinity and so can x, but y=x squared (x real) s not because x can be negative but y is not, If you want to expand the English rather than just give the translation then you could put something like /injective map (ie a function in which the domain equals the image, math.)/ ============= Editor: In processing this earlier, I wrote: A "surjection" is the same thing as a "one-to-one function". Sorry, I meant: An "injection" is the same thing as a "one-to-one function". injection, surjection ... such confusable terms -- damn Bourbaki! :-) |
| Diff: |
# - 單射 单射 [dan1 she4] /one-to-one function/injective map (math.)/ # + 單射 单射 [dan1 she4] /injective map (ie a function in which the domain equals the image math.)/ |