Symbol in context

$R^2$

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Article-grounded definition

the square of R; the mean radius.

\frac{C}{MR^2},

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

C/MR^2 = 0.4

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.