Itβs a symbol and not a unit. So itβs β50% of 1 meter is 50 cmβ.
Source: https://styleguide.iec.ch/?docs=iec%2Ftypographic%2Funits-and-symbols
Going a bit further the 9th version of the SI also to put a space between it.
Looking at the back of nutrition values of (Dutch) peanut butter I noticed that in the second column it mixes both styles.
And most formatting strings donβt add space between percentages.
Fluff! This is annoying. ππ£
That might have a different cause? Such as "E = mc2" describes 3 values where the right side describes a multiplication?
Did a bit more digging, but couldn't find the reason, but I assume the space rule was used to take poor penmanship/printing into account so that one could avoid that "50% of 9g and 1l" be confused with 500/0 of 99 and ll". This also explains the few exceptions (such as degrees and angles)
@DevWouter @matthiasott
"describes 3 values where the right side describes a multiplication?" - no, the right side is a single Term/Product, whereas mxcΒ² would be multiplication of 2 Terms https://dotnet.social/@SmartmanApps/110846452267056791
"the few exceptions (such as degrees and angles)" - there are no exceptions in Maths - no spaces between scalar and units
Attached: 1 image #MathsMonday week 2, Terms. Simply put, in #Mathematics Terms are separated by operators and joined by brackets. The most common example is 2a=(2*a). This makes it simpler to write fractions. e.g. 1/2a rather than 1/(2*a). That also means 1/2a isn't mistaken as half a, which would actually be written as a/2. Notice in the latter that the a is to the left of the division, which means it's in the numerator, and vice-versa for the former (more about this aspect of #Maths #Math later, but first)...
Yes on the first part: multiplication should have been product. (Quick question: Would it be correct to say that the product, although a single term, by it self contains two terms?)
As for the second part, I was talking about the official standards such as SI, NIST, etc.
Itβs more that my terminology was wrong. The product here is the result of a multiplication. The product describes the term, the multiplication the operation.
Keep in mind that the discussion was about definitions of math and how it should be typed.
@DevWouter yes you can make such a distinction but it can lead to issues if you assume that others always make it very carefully. I would say that the word product *emphasises* the result while multiplication *emphasises* the operation. At least, with this in mind, you won't be led astray when others do just that!
These style guides are, at the end of the day, a bit esoteric and arbitrary. But stuff looks nicer if everything is coherent, unlike in the picture!
I think we all are in agreement that being a bit pedantic is a requirement in this discussion. π
Matthias Ott
Wouter Lindenhof
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