Can anybody help me with this problem please?

f is mapping from X onto Y, F is filter on X, f(F) need not to be filter on Y.

I can't see no counterexample. Thank you very much

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- Dec 14th 2010, 01:32 PMsidifilter
Can anybody help me with this problem please?

f is mapping from X onto Y, F is filter on X, f(F) need not to be filter on Y.

I can't see no counterexample. Thank you very much - Dec 14th 2010, 02:10 PMDrexel28
- Dec 14th 2010, 02:27 PMsidi
really! Thanks a lot, I guess I am remade....thanks