  The work examines norms in of fundamental trigonometric splines of odd and
even degrees, which in some cases coincide with polynomial ones. Fundamental
trigonometric splines for the case where the con-vergence factors depend on the
parameter are also considered. It is shown that an important characteristic of
these splines of odd and even degrees is their complete variation. The
semi-norms of trigonometric splines of odd degrees are also studied. The given
material is illustrated by graphs; so, in particular, an illustration of the
property of the least curvature of polynomial splines is given for the first
time.
