22 lines
870 B
Plaintext
22 lines
870 B
Plaintext
extends templates/main.jade
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block head
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include templates/katex.jade
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block title
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| Math Notation | xigoi
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block content
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h1 Math Notation
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h2 Square root
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p \(\sqrt{\text{This is how you write a square root.}}\)
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p \(\sqrt{\text{It has no hook at the end.}}\)
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h2 Tau
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p
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a(href="https://tauday.com/tau-manifesto") \(\tau\) is good.
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| Use it.
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h2 Function exponentiation
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p Bijective functions form a group with composition \(\circ\) as the group operation. So logically, function exponention means repeated application. It can also be used for regular functions, even though they don't form a group. So \(\sin^2(x)\) means \(\sin(\sin(x))\), not \(\sin(x)^2\).
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h2 Factorial of a real number
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p There's no reason why the notation \(x!\) couldn't be used for the factorial of a real number, which many people awkwardly write as \(\Gamma(x + 1)\).
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