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Objective competence and experience in the following subjects: Photography/lenses, fitness, electric guitar, golf, tennis, trading stocks, nutrition, chess, programming, and wine tasting. PM me for information on any of these topics.


2d
comment Piecewise functions: Got an example of a real world piecewise function?
Is this also called static vs dynamic friction ?
Sep
10
comment Cost per item. Diminishing marginal discount, if you will. (Bigger discount for first few items) Optimal number of units to buy?
Thanks Nick. However, I don't think I want to minimize f'. It is clear that the smallest value of f' is where the curve is the flattest, which is at the extreme right (at 12 units) However, I am not looking for the flattest part of the curve, but where the incremental decrease is not as significant as the prior one.
Sep
10
revised Cost per item. Diminishing marginal discount, if you will. (Bigger discount for first few items) Optimal number of units to buy?
deleted 2 characters in body
Sep
10
revised Cost per item. Diminishing marginal discount, if you will. (Bigger discount for first few items) Optimal number of units to buy?
added 447 characters in body
Sep
10
asked Cost per item. Diminishing marginal discount, if you will. (Bigger discount for first few items) Optimal number of units to buy?
Sep
8
awarded  Famous Question
Aug
13
awarded  Popular Question
Jul
13
comment Differential equations. Shortcut way to solve this problem?
Clever! Clever!
Jul
7
accepted How can I write a system of equations puzzle if given the solutions? (work backwards?)
Jul
7
asked How can I write a system of equations puzzle if given the solutions? (work backwards?)
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jun
11
asked Oops, $y^2=2x^2+C$ is not the same as $y=\sqrt{2x^2}+C$
Jun
4
accepted Why does $u$-substitution not work here?
Jun
4
revised Why does $u$-substitution not work here?
deleted 199 characters in body
Jun
4
asked Why does $u$-substitution not work here?
May
14
asked Proof of magic square algorithm?
May
2
accepted Confusing related rates problem
May
2
revised Confusing related rates problem
edited body
Apr
30
revised Confusing related rates problem
added 96 characters in body