Symbol in context

$N_{86}$

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

Meanings in context

Article-grounded definition

each mineral’s measured rubidium-87 to strontium-86 ratio [ 18 ].

R_t = R_0 + \frac{N_{87}}{N_{86}}\left(e^{\lambda t} - 1\right),

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

N_{87}/N_{86}

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