Numbers & Arrays

Syntax

Semantics

π‘Ž

a scalar

𝒂

a vector

𝑨

a matrix

𝗔

a tensor

𝔸

a set of elements

Indexing

Syntax

Semantics

𝒂𝑖

scalar element 𝑖 of vector 𝒂

𝑨𝑖:

row 𝑖 of matrix 𝑨

𝑨:𝑖

column 𝑖 of matrix 𝑨

π—”π‘–π‘—π‘˜

element (𝑖,𝑗,π‘˜) of a 3D tensor 𝗔

𝗔:,:,𝑖

2D slice of a 3D tensor 𝗔

𝔸(𝑖)

element 𝑖 in set 𝔸

Variable

Syntax

Semantics

𝐚

variable of a scalar

variable of a vector

Graphical Models Syntax

Probabilistic Inference - Syntax