Mathematics
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graydad

A retired mathematician that has become a software developer. I still have a soft spot for mathematics.

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  • Member for 5 years, 10 months
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  • Last seen Nov 19 '19 at 0:53

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32 What's wrong with l'Hopital's rule? May 17 '15
24 What is an example of function $f: \Bbb{N} \to \Bbb{Z}$ that is a bijection? Oct 9 '14
19 Why/How does this sqrt term work? The inverse of a fraction in a sqrt Mar 25 '15
15 Easy math proofs or visual examples to make high school students enthusiastic about math Jun 24 '15
11 What to answer when people ask what I do in mathematics Feb 8 '15
11 Chain rule with triple composition Nov 14 '14
10 The coefficient of $x^9$ in the expansion of $(1+x)(1+x^2)(1+x^3)\cdots(1+x^{100})?$ Oct 11 '15
10 Doubt about the domain in logarithmic functions. May 26 '15
9 subtracting inequalities if difference is positive Jun 14 '15
9 Proof: The identity matrix is invertible and the inverse of the identity is the identity Feb 23 '15
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