Equation 2 · Part 3 · Einstein's Random Walk and the Mathematics of Genetic Drift
Symbol t
What this part means
t is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.
Its job in the formula
t is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.
Full expression→Symbol t→Article meaning
The passage around this formula
Working through the statistical mechanics of a wall permeable to solvent but not to suspended particles, Einstein arrived at a differential equation for how the concentration f(x,t) of particles along one axis changes over time: . the diffusion equation, in a form still written the same way today [ 1 ] . Solving it for particles released from a point gives a spreading distribution whose variance grows linearly, not with the square root of time as a naive guess might suggest but as
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.
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Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.