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## Main Question or Discussion Point

suppose v1 and v2 are two linear subspaces of a linear subspace v

is there any measure of the distance between the two subspaces?

in two dimensional complex space, i think the distance between x and y axes is the maximum possible value. Intuitively, if two subspaces are orthogonal to each other, then their distance is of the largest possible value.

is there any measure of the distance between the two subspaces?

in two dimensional complex space, i think the distance between x and y axes is the maximum possible value. Intuitively, if two subspaces are orthogonal to each other, then their distance is of the largest possible value.