My undergraduate degree was in Mathematics (University of Dallas, 1971). My core interest is General Systems Theory. My career was mostly in computer programming, however, I also taught English, and high-school mathematics, in China for 9 years. I am currently semi-retired, drawing social security, and working on my various websites. As far as I am concerned, anything I do here is in the Public Domain.

Oct
6
awarded Yearling
Oct
6
awarded Yearling
Sep
15
awarded Notable Question
Aug
25
answered is it possible to motivate square roots e.g. $\sqrt{2}$ in business math?
Aug
24
comment Examples of cultural limitations on math education
Don't forget the language barrier as a cultural limitation. This is why Esperanto was created.
Aug
24
comment Good, simple examples of induction?
There is discussion on this at Mathematics Stack Exchange: math.stackexchange.com/questions/423513/…
Aug
24
comment How to convey the meaning of "mathematical maturity"?
old joke: Mathematics is really Psychology. Psychology is really Biology. Biology is really Chemistry. Chemistry is really Physics. Physics is really Mathematics.
Aug
24
comment What are some best practices for creating student groups?
You're assuming they all speak the same language? Consider the possibility of using Esperanto to lower the participation barrier.
Aug
24
comment Adult Mathematical Literacy
Addressing the issue of numeracy was a main reason for my creating the content that I later deposited in my website of public-domain materials, at www.public-domain-materials.com
Aug
24
awarded Teacher
Aug
24
answered Open-Source Math Textbooks
Aug
24
awarded Autobiographer
Aug
24
comment Is there any significance to the logarithm of a sum?
I have up-voted your answer. (I’m not claiming to understand it - I’m just giving you the benefit of the doubt, namely, that your answer is indeed as astute as it seems.) Since you say in your profile that you are a non-native speaker interested in writing and speaking decent English, you might be interested in the learner-friendly front-end to the (free, online) Merriam-Webster dictionary that I am creating, at prof-vortaro-de-la-merk-angla.weebly.com
Aug
24
comment Is there any significance to the logarithm of a sum?
Nice. (The editor won't let me just say'Nice.', so, hmmm, Let me also say, Three cheers for Esperanto!)
Aug
3
revised Help to understand material implication
added remark about a minute of silence
Aug
3
revised Are angles ever multiplied?
fixed typo "not" --> "now"
Jul
27
revised Help to understand material implication
added remark about selfies
Jul
18
revised Help to understand material implication
added the example of the definition of a critical point
Jul
15
comment What is the site etiquette about (i) asking and (ii) answering questions in a language other than English?
Was it something I said?
Jul
12
awarded Good Question
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