Besicovitch theorem

The name might refer to:

• A covering theorem often used in measure theory (see Covering theorems (measure theory))
• A theorem characterizing the differentiation of Radon measures (see Differentiation of measures)
• A theorem characterizing $1$-dimensional unrectifiable sets through the measures of their projection, generalized by Federer to sets of any dimension (see Besicovitch-Federer projection theorem).