In mathematics, quadratic variation is used in the analysis of stochastic processes such as Brownian motion and other martingales.

BDG may refer to:

B. D. Ganapathy (Bācamāḍa Ḍevaiah Gaṇapati) was a noted writer, scholar and journalist writing in English, Kannada and Kodava Takk, covering religion, anthropology and philosophy.

β-Glucans (beta-glucans) comprise a group of β-D-glucose polysaccharides naturally occurring in the cell walls of cereals, bacteria, and fungi, with significantly differing physicochemical properties dependent on source.

The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.

For other uses, see BDO (disambiguation).

Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a particular value or infinity.

The Big Five personality traits, also known as the five factor model (FFM), is a model based on common language descriptors of personality.