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 6 years, 7 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
26 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
12 Chain rule with triple composition Nov 14 '14
11 Doubt about the domain in logarithmic functions. May 26 '15
11 What to answer when people ask what I do in mathematics Feb 8 '15
11 Proof: The identity matrix is invertible and the inverse of the identity is the identity Feb 23 '15
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
9 subtracting inequalities if difference is positive Jun 14 '15
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