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Math Symbol Frequencies

leancrew.com

1–10 of 21 posts

Re: Math Symbol Frequencies

#2
I had a bit of a chuckle that apparently 5 out of 50000 opening "(" parentheses weren't closed, but then I saw that 2 out of 12000 "]" brackets weren't opened! What criminal is using these standalone?

Re: Math Symbol Frequencies

#3
post #2

I had a bit of a chuckle that apparently 5 out of 50000 opening "(" parentheses weren't closed, but then I saw that 2 out of 12000 "]" brackets weren't opened! What criminal is using these standalone?

Mixing them should be relatively common when denoting intervals, as in "(a, b]" or "[a, b)", so that'd be one cause for being unbalanced. But even so, the math on their usage still doesn't add up.

Re: Math Symbol Frequencies

#5
post #2

I had a bit of a chuckle that apparently 5 out of 50000 opening "(" parentheses weren't closed, but then I saw that 2 out of 12000 "]" brackets weren't opened! What criminal is using these standalone?

There is the normal notation for half-open ranges, which would lead to unbalanced brackets.

Re: Math Symbol Frequencies

#6
post #4

It seems weird that ∋ would be the sixth-most frequent symbol, while ∈ doesn't figure at all.

Agreed. Even stranger to me is @ as the fourth most common operator, supposedly more common than +. The whole thing seems dubious.

Re: Math Symbol Frequencies

#7
post #2

I had a bit of a chuckle that apparently 5 out of 50000 opening "(" parentheses weren't closed, but then I saw that 2 out of 12000 "]" brackets weren't opened! What criminal is using these standalone?

You won't like bra-ket notation then :)

Re: Math Symbol Frequencies

#8
post #6
post #4

It seems weird that ∋ would be the sixth-most frequent symbol, while ∈ doesn't figure at all.

Agreed. Even stranger to me is @ as the fourth most common operator, supposedly more common than +. The whole thing seems dubious.

I would suspect that the @ comes from author email addresses. It's not entirely wrong to call that an operator. ;)

Re: Math Symbol Frequencies

#9
post #8
post #6

Earlier quoted context omitted.

Agreed. Even stranger to me is @ as the fourth most common operator, supposedly more common than +. The whole thing seems dubious.

I would suspect that the @ comes from author email addresses. It's not entirely wrong to call that an operator. ;)

Do papers tend to have more email addresses or more plus signs? I'd expect the latter, by a lot.

Re: Math Symbol Frequencies

#10
post #8
post #6

Earlier quoted context omitted.

Agreed. Even stranger to me is @ as the fourth most common operator, supposedly more common than +. The whole thing seems dubious.

I would suspect that the @ comes from author email addresses. It's not entirely wrong to call that an operator. ;)

No, the data (as described in So's thesis) was mathematical expressions extracted from TeX source code, so the surrounding text and email addresses etc. were ignored. Skimming through by eye I can't see @ in any of So's tables, and searching for the hex Unicode value the tables list for every other character yields no hits: @ is not in the tables.

∋ is there anomalously frequently, and @ is missing, so something seems to have gone wrong, probably at multiple stages in the pipeline.

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