Their amplitude is parameterized by the tensor-to-scalar ratio (denoted r), which is determined by the energy scale of inflation.

Where m denotes mass, and r denotes a radius.

This intrinsic anisotropy (denoted r) is usually measured by embedding the fluorophore in a frozen polyol.

There are several correlation coefficients, often denoted ρ or r, measuring the degree of correlation.

Polar distance (geometry), more correctly called radial distance, typically denoted r, a coordinate in polar coordinate systems (r, θ)

The term comes from the Greek letter rho, denoting "r".

In geometry a radial distance, typically denoted r, is a coordinate in polar coordinate systems (r, θ).

Then 3 "B" (or 5 "B") denotes the ball of the same form, with 3 "r" (or 5 "r") replacing "r".

Pearson's correlation, often denoted r and introduced by Karl Pearson, is widely used as an effect size when paired quantitative data are available; for instance if one were studying the relationship between birth weight and longevity.

The release time, denoted r, is determined by adding up the processing times of all of the jobs that have to be performed on the machine before the respective job can be performed.