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| ``Re: Cartesian product''
by pahio on 2004-10-01 13:09:15 |
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My teachers, some professors in the University of Turku, have already in 1970's used the big cross (\bigtimes) for denoting the Cartesian products in the group theory and the measure theory. (Also I when I lectured a course of abstract algebra in the University of Tampere in 1970 used this notation.) I still think, that it fits best together with the basic case AxB and makes clear distinction between the Cartesian product and the product in multiplication. But the force of habit determines the practice... =o(
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