this post was submitted on 07 Apr 2025
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A microblog post by @kareem_carr saying "as soon as i saw they were using asterisks for multiplication symbols, i knew we were in trouble", with an image from the "Office of the United States Trade Representative (Executive Office of the President)" showing the mathematical formula $\Delta \tau_i = \frac{x_i - m_i}{\varepsilon * \varphi * m_i}$. The formula show asterisks (*) instead of multiplication signs (×).

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[–] [email protected] 37 points 2 weeks ago (18 children)

I don't get the significance. How should the formula be represented?

[–] [email protected] 130 points 2 weeks ago (7 children)

Most mathematicians, engineers, and scientists don’t use the asterisk symbol for multiplication. Most don’t write any symbol as it’s implicit. If they do use a symbol they would use a dot or x symbol (though never an actual x). In mathematics, the asterisk is mostly only used to represent convolutions.

Most common:

abc

Less common:

abc

a × b × c

Never:

a * b * c

While to most people this doesn’t really matter (and should feel free using * for multiplication). It shows someone with minimal formal experience in mathematics using this formula

[–] mcteazy 4 points 2 weeks ago

I think this is true ONLY in formal writing, which this document clearly intends to be despite it's complete inanity. Asterisks are used in computer code for multiplication and shorthand messages/emails all the time. Not many scientists/engineers/mathematicians out there that can't write at least an excel formula

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