https://en.wikipedia.org › wiki › Undefined_(mathematics)

In mathematics, the term undefined is often used to refer to an expression which is not assigned an interpretation or a value (such as an indeterminate form, which has the possibility of assuming different values). [1]

https://math.stackexchange.com › questions › 4524071 › what-exactly-does-undefined-mean

The "first level" answer should be: "undefined" plainly means "not defined", i.e. the expression has no value. For example, $\frac{a}{0}$ is undefined for all $a\in\mathbb R$, $\tan(k\pi+\pi/2)$ is undefined for all $k\in\mathbb Z$, $\log(x)$ is undefined for $x\le 0$.

https://mathworld.wolfram.com › Undefined.html

An expression in mathematics which does not have meaning and so which is not assigned an interpretation. For example, division by zero is undefined in the field of real numbers.

https://math.stackexchange.com › questions › 3177720

The function $s(t)= 3/(t+2)^2-6(t+2)+9$ is undefined when $t=-2$, because division by $0$ is undefined. For another example, in the context of real numbers, a function involving a square root would be undefined when the argument of the square root is a negative number.

https://mathleaks.com › study › kb › concept › undefined_expression

A mathematical expression is said to be undefined if it is not possible to represent it with the number set being used. A few common examples of undefined expressions are the following. Concept. Division by Zero. Expressions similar to a0, which show a being divided by 0, are said to be undefined.

https://math.stackexchange.com › questions › 1228586

When referring to the result of a mathematical operation, undefined means there is no meaningful result. When referring to a mathematical object which satisfies some mathematical relationship, undefined means no object satisfies that relationship. The operation $f$(🍊) has no meaningful result.

https://www.themathdoctors.org › zero-divided-by-zero-undefined-and-indeterminate

0/n = 0 for all non-zero numbers n. You get into the tricky realms when you try to divide by zero itself. It's not true that a number divided by 0 is always undefined. It depends on the problem. I'm going to give you an example from calculus where the number 0/0 is defined.

https://www.khanacademy.org › math › algebra › x2f8bb11595b61c86:foundation-algebra › x2f8bb...

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