Symbol t

Its job in the formula

t is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Where the article explains it

Here $C_t$ is the stock of cultural complexity in circulation at time t ; $\rho_t$ $\in$ [0,1] is the transmission-fidelity coefficient — the share of $C_t$ that survives one round of copying, the same quantity Henrich’s Tasmania case shows collapsing when the effective transmitting population shrinks; $I_t$ is genuinely new human innovation entering the pool; and $L_t$ is loss from forgetting, obsolescence, or population decline.

Learn the underlying idea

A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

Open the illustrated variables: a letter stands for a value guide →