For example the symbol ∈ ‘Element of’.

I have found
http://www.fileformat.info/info/unicode/char/2208/fontsupport.htm

The end of this tunnel is in sight but I don’t presently have enough time in my fueltank to see it through. A solution may follow &soonish;)

“This would be very interesting, if my browser would show me the mathematical symbols in your discourse not as [] boxes…”

This is indeed - as you notice - a illustrating shortcoming in especially a note on a subject such as versioning. I used all HTML escapes such as ∃ for “there exists” (the reverse capital E) and ∀ for “for all” (upside down capital A), assuming this would ensure support among all browsers. Which version of which browser do you use?

This would be very interesting, if my browser would show me the mathematical symbols in your discourse not as [] boxes, meaning the Unicode references couls not be resolved, but in the way you probably intended me to see them: as the mathematical symbols with which I established such a heartfelt love-hate relationship as an undergradute calculus student.

I considered printing the page and using it as a ‘fill-in-the-blanks’ exercise to remember those happy bygone days but reconsidered that it would probably be better to let bygones remain bygones ans post this comment.

Of course, that could be part of the problem-field as stated, because:
- I use a browser
- You use a browser
- But whoever will guarantee that we see the same things, e.g. is my

1. over the ages, the problem of reading back from a notation, be it mathematical or verbal, the same information that the auther poured into it, has as far as I know been formally stated but never been solved

2. however, each restatement of this same never-solved problem has
advanced our (humankind’s) knowledge somewhat