Basic math with infinity

Basic math with infinity

Physicist: Several questions about doing basic math with infinity have been emailed over the years, so here’s a bunch of them! However, the most straightforward infinity that makes the most intuitive sense (for most people) is probably the infinity that “sits at the end of the number line“. “Value” is in quotes there (‘ ” ” ‘) because infinity isn’t an actual value, it’s more of a place-holder for “bigger than anything else”. So, just to be specific: > x, for any number x, and is assumed to be the unique thing that has that property (Nothing more or less). Pick any number, x, and you find that + > + x/2 > x/2 + x/2 = x.

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