# Tagged Questions

Use the convention tag for questions about standard, cultural practices in mathematics.

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### Scalar when undefined: real, complex, or something else

For an arbitrary vector space one defines, the scalar field can be anything: real, complex, rational, or some other previously defined field. However, in some texts on linear algebra for example, ...
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### Why do we say pi is the ratio of the circumference to the diameter, and not diameter to the circumference?

Everywhere I see it written, $\pi$ is described as "the ratio of the circumference to the diameter". I know $\pi = C/d$, but the ratio $3.14...:1$ is $3.14$... diameters to $1$ circumference. So ...
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### what are the formal names of operands of unary operations?

In case of binary operations, operands have formal names. Taking addition for example: $$a + b$$ We can formally call $a$ the augend and $b$ the addend. Names for operands are available in individual ...
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### Which is more simplified: $a\sqrt{b}$ or $\sqrt{c}$?

Which is considered more simplified (if it matters)? $a \sqrt{b}$ or $\sqrt{c}$ For example: $2 \sqrt{3}$ or $\sqrt{12}$
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### “Second kind” orthogonal polynomials and functions

Recently I've been doing reading in the subject of orthogonal polynomials on the real line (OPRL). Such OPs arise in solving the three-term recurrence relation x u_n=a_{n+1}u_{n+1}+b_{n+1}p_n+a_{n}...