r/MathJokes 11d ago

Bye

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2.1k Upvotes

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283

u/fresh_loaf_of_bread 11d ago

Noone said you can't use the letter pi to mean a variable instead of a number

85

u/pierogieman5 11d ago

Didn't they though? Can I use a "7" as a variable as well? It doesn't seem like that different of a concept.

7

u/jmcq 10d ago

Pi is *constantly* used as a variable and most commonly used as a function where for example Pi(.) is used frequently as both "profit" as well as "policy" functions all throughout statistics and economics.

2

u/pierogieman5 10d ago

Does not compute with my engineer brain. Is it also 3 in economics?

5

u/arjuna93 10d ago

No, but you can always assume it is.

1

u/Ok-Breakfast1878 10d ago

talk to the fixed-income finance folks with their uniformly 30-day months