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Identifiers of Well-Known Entities

Q

How to represent identifiers of well-known entities (constants, functions and operators)?

✍: FYIcenter.com

A

"ISO 80000-2 Quantities and Units - Mathematics" specifies that identifiers of well-known constants, functions and operators should be presented in Roman upright style.

For multi-letter identifiers, the <mi> tag is rendered in upright style correctly. But for single-letter identifiers, you need to use the mathvariant="normal" attribute stop the italic style. For example: 

<math><mi>sin</mi><mo>&#x2061;</mo><mi>&#x03B8;</mi>
  <mo>=</mo><mi>cos</mi><mo>&#x2061;</mo>
  <mo>(</mo><mn>0.5</mn><mi mathvariant="normal">&#x03C0;</mi><mo>-</mo><mi>&#x03B8;</mi>
  <mo>)</mo></math>
    sin⁡θ
      =cos⁡
      (0.5π-θ
      )

 

⇒ List of Well-Known Constants

⇐ Identifiers of General Constants, Variables and Functions

⇑ ISO 80000-2 Quantities and Units - Mathematics

⇑⇑ MathML (Mathematical Markup Language)

2026-10-17, ∼1848🔥, 0💬

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