infinity, **the concept of something that is unlimited, endless, without bound**. The common symbol for infinity, ∞, was invented by the English mathematician John Wallis in 1655. Three main types of infinity may be distinguished: the mathematical, the physical, and the metaphysical.

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## Is infinity a defined number?

**Infinity is not a real number, it is an idea**. An idea of something without an end. Infinity cannot be measured. Even these faraway galaxies can’t compete with infinity.

## Is infinity defined or undefined?

Infinity & undefined

In mathematics, **anything divided by zero is not defined** (and not infinity). But ‘limit’ (1/x); x->0 is well defined and is equal to infinity (it is the basic concept of limits).

## Why is infinity not defined?

Originally Answered: What is the difference between infinity and not defined? Undefined: Quantity that does not have a definition. **Infinity is an undefined quantity but not the only one**. a/0 is undefined: no number multiplied by 0 can yield a finite number a.

## Is infinity real or just a concept?

So **there does not exist any one single “infinity” concept**; instead, there exists a whole collection of things called “infinite cardinal numbers”.

## Who Defined infinity?

mathematician John Wallis

Read a brief summary of this topic. infinity, the concept of something that is unlimited, endless, without bound. The common symbol for infinity, ∞, was invented by the English mathematician **John Wallis** in 1655. Three main types of infinity may be distinguished: the mathematical, the physical, and the metaphysical.

## Is pi an infinite?

Pi is a number that relates a circle’s circumference to its diameter. Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction. That’s because **pi is what mathematicians call an “infinite decimal”** — after the decimal point, the digits go on forever and ever.

## Why is 1 infinity undefined?

**Infinity is a concept, not a number**; therefore, the expression 1/infinity is actually undefined. In mathematics, a limit of a function occurs when x gets larger and larger as it approaches infinity, and 1/x gets smaller and smaller as it approaches zero.

## What is infinity divided 0?

Thus infinity/0 is a problem both because infinity is not a number and because division by zero is **not allowed**.

## Can zero be divided by 1?

Answer: **Zero divided by 1 is 0**.

Let’s divide zero by 1. Explanation: Zero divided by any number is always 0. 0/1 = 0, whereas, 1/0 is not defined.

## Is anything truly infinite?

Although the concept of infinity has a mathematical basis, **we have yet to perform an experiment that yields an infinite result**. Even in maths, the idea that something could have no limit is paradoxical. For example, there is no largest counting number nor is there a biggest odd or even number.

## Is infinity a paradox?

**The paradox arises from one of the most mind-bending concepts in math: infinity**. Infinity feels like a number, yet it doesn’t behave like one. You can add or subtract any finite number to infinity and the result is still the same infinity you started with. But that doesn’t mean all infinities are created equal.

## Can there be an actual infinite?

The actual infinite involves never-ending sets or “things” within a space that has a beginning and end; it is a series that is technically “completed” but consists of an infinite number of members. According to Aristotle, **actual infinities cannot exist because they are paradoxical**.

## Can humans understand infinity?

For many of us, **it’s easy to understand the concept of infinity**, but we can’t comprehend how “big” or “never-ending” it is, because our perception of time always has a beginning and an end — minutes, days, years, lifespans.

## Is infinity real or imaginary?

No. **Imaginary numbers are well defined and do not include a number called infinity**.