[Solved] How do I express "diameter >= 1"

jucala · Post by **jucala** » Tue May 12, 2020 8:40 am

Is there a nicer way to write the >= symbol in a text?
Example: "This is valid for particles with a diameter >= 1 μm"

I could use a formula like "a geslant b " or "a >= b " to create a nicer symbol of >=.
But this works only if there is a number before the ">=" symbol. Dows anyone know a nice workaround to use the ">=" symbol in text?

Post by **JeJe** » Tue May 12, 2020 9:49 am

https://www.fileformat.info/info/unicod ... /index.htm

Post by **RoryOF** » Tue May 12, 2020 9:54 am

Or, if working in text, in place of the symbol to which JeJe has pointed, one could use the abbreviations GT (Greater Than), GE (Greater than or Equal), LT, LE, EQ.

These would all need to be defined in text on or prior to first use, for easier comprehension.

Post by **Zizi64** » Tue May 12, 2020 10:21 am

Insert - Special character

: The image was created in my LibreOffice 6.1.6

Post by **keme** » Tue May 12, 2020 10:30 am

jucala wrote:... I could use a formula like "a geslant b " or "a >= b " to create a nicer symbol of >=. But this works only if there is a number before the ">=" symbol. ...

In the formula editor (aka. "Math") you can use an empty group as an operand. Token grouping in Math uses the curly braces.

Code: Select all

Basically ... 
{} ge b
... or for your particular example case ...
{} geslant 1 "μm"

Post by **Hagar Delest** » Tue May 12, 2020 10:39 am

BTW (OT), does someone know why the dash for the equal sign is flat and not parallel to the bottom part of the greater than symbol?
My eyes always bleed when I see this.

Post by **John_Ha** » Tue May 12, 2020 10:48 am

Because an equal sign is horizontal???

Bill · Post by **Bill** » Tue May 12, 2020 11:10 am

LibreOffice has an entry in the AutoCorrect Replacement Table to replace :>=: with ≥. AOO doesn't have this entry, but you can add a new entry to replace >= with ≥.

Lupp · Post by **Lupp** » Tue May 12, 2020 11:19 am

@Hagar:
You Chinese? The Chinese-heavy fonts SimSun and NSimSun (coming with recent Windows) have it the way you want.
In addition they have U+2266 'LESS THAN OVER EQUAL TO' and U+2267 (resp.) missing in most fonts. Probably there are also rare fonts having the '...EQUAL TO' parallel to the lower arm of the angle then?

As for me, eyes are heavily bleeding if I see fonts not clearly distinguishing a lower case L from an upper case i. That seems to be heritatage from famous 'Helvetica'... Are we crazy? Obviously!

Post by **JeJe** » Tue May 12, 2020 11:21 am

Hagar Delest

Because ≽ is given a different meaning - succeeds or equal to.

https://en.wikipedia.org/wiki/Ordered_set_operators

jucala · Post by **jucala** » Tue May 12, 2020 11:55 am

Thank you very much for your help!
It is just Insert / Special Character, somehow I overlooked it before. But also nice to know the empty placeholder in a formula, I will also use it one day.

Post by **JeJe** » Tue May 12, 2020 12:00 pm

I find it easier to type unicode and the description in a search box and copy and paste the character in from a webpage.

The Special Character dialog has a categories combo but I find it cumbersome for looking up an individual character - as it doesn't offer a named search.

Post by **Hagar Delest** » Tue May 12, 2020 12:29 pm

JeJe wrote:Because ≽ is given a different meaning - succeeds or equal to.

But that's a curvy glyph. Why not have a straight one?
Agreed, the difference would be tiny but the context would confirm the correct meaning (like lower case L vs. upper case i).

I've had my dose of mathematics as a student (enough to learn plenty of exotic names like Chebyshev's sum inequality, Bernoulli's inequality, Navier–Stokes equations...) and I've never seen that horizontal dash for greater than or equal. Math teachers were even upset by some student who used the sign that looked like the equal sign with a slant dash above.
I'm not that crazy but the current sign is just not good looking at all.

Post by **John_Ha** » Tue May 12, 2020 12:45 pm

Hagar Delest wrote:But that's a curvy glyph. Why not have a straight one?

The relation x succeeds or is equal to y is written x ≽ y.

The relation x is greater than or equal to y is written x ≥ y.

Post by **Hagar Delest** » Tue May 12, 2020 2:24 pm

John, I (always) got it, thanks.
My point is that the greater than or equal to is not a good representation.
At a time when lot of energy is spent to create emoticons and add them in the unicode maps, I think that there are some very old characters that ought to be updated.
It seems to prove that the mathematicians are still too much in their books and don't really care about that.
Only LaTeX has it right with a variant:

: Latex.png (4.05 KiB) Viewed 5242 times

https://oeis.org/wiki/List_of_LaTeX_mat ... _operators

Lupp · Post by **Lupp** » Tue May 12, 2020 2:25 pm

The variant of ≥ having the single line parallel to the lower arm of the angle in SimSun font I mentioned is NOT curved. (If you haven't the font on your system you can't see it this way, of course.)
The additional Unicode characters for 'GREATER_THAN OVER EQUAL TO' and resp. missing in most fonts may be shown using the glyphs of a replacement font.
There is an attachment now:

specialComparatorCharacter.odt: (11.61 KiB) Downloaded 228 times

Post by **Hagar Delest** » Tue May 12, 2020 2:32 pm

Excellent, thanks, I do have it on my Windows 10 machine!
Can't wait for using it in a document now.

Post by **John_Ha** » Tue May 12, 2020 3:23 pm

Hagar Delest wrote:Only LaTeX has it right with a variant:

https://oeis.org/wiki/List_of_LaTeX_mat ... _operators

LaTeX has the symbols differentiated but the comments are wrong!

Post by **Hagar Delest** » Tue May 12, 2020 3:52 pm

Why are they wrong?
They are quite different from precedes or equals / succeeds or equals (provided in the same table).

Post by **John_Ha** » Tue May 12, 2020 4:31 pm

Hagar Delest wrote:Why are they wrong?
They are quite different from precedes or equals / succeeds or equals (provided in the same table).

Sorry - I didn't spot that ≽ uses curvy lines.
I searched the Official Unicode Consortium code chart of Mathematical Operators with greater and I could not find a symbol like ≽ which uses straight lines!

As you will have no doubt have realised my ignorance on this topic remains about as large as my complete confusion.

Bill · Post by **Bill** » Tue May 12, 2020 7:35 pm

Use of the slanted version seems to be limited to certain locales, including France, Russia and Vietnam.

Meaning of ⩾, ⩽, ⪖, ⪕

Unicode Character 'GREATER-THAN OR SLANTED EQUAL TO' (U+2A7E)

I have found the slanted version in a few sans fonts on my system, but not in any serif fonts.

GREATER-THAN OR SLANTED EQUAL TO (U+2A7E) Font Support

Post by **Hagar Delest** » Tue May 12, 2020 7:44 pm

Bill wrote:I have found the slanted version in a few sans fonts on my system, but not in any serif fonts.

GREATER-THAN OR SLANTED EQUAL TO (U+2A7E) Font Support

Thanks!
That means that some had that need too! Will make sure to use them from now.

[Solved] How do I express "diameter >= 1"

[Solved] How do I express "diameter >= 1"

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Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"

Re: [Solved] How do I express "diameter >= 1"