Calculus vs. Non-contradiction?

I have no background in Calculus but I am convinced that the
principle in logic of Non-Contradiction to be correct. A and Not-A
cannot both be true simultaneously. However, I was recently told by
someone, who is reading some very big, philosophical book on
mathematics, that the proposition of calculus disproves the Law of Non-
Contradiction in logic. Can someone fill me in on how this would
work? Thanks.

.

Relevant Pages

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