…
►
34.4.1
…
►Except in degenerate cases the combination of the triangle inequalities for the four
symbols in (
34.4.1) is equivalent to the existence of a tetrahedron (possibly degenerate) with edges of lengths
; see Figure
34.4.1.
…
►
34.4.2
…
►
34.4.3
…
…
►
34.5.9
►
34.5.10
…
►
34.5.11
…
►
…
►
34.5.16
…
§25.15 Dirichlet -functions
►
§25.15(i) Definitions and Basic Properties
►The notation
was introduced by
Dirichlet (1837) for the meromorphic continuation of the function defined by the series
…
…
►
§25.15(ii) Zeros
…
…
►With
and
integers such that
, and
and
angles such that
,
,
…
are known as
surface
harmonics of the first kind:
tesseral for
and
sectorial for
.
Sometimes
is denoted by
; also the definition of
can differ from (
14.30.1), for example, by inclusion of a factor
.
…
►Here, in spherical coordinates,
is the
squared angular momentum operator:
…and
is the
component of the angular momentum operator
…
…
►where
is the (squared) angular momentum operator (
14.30.12).
The eigenfunctions of
are the spherical harmonics
with eigenvalues
, each with degeneracy
as
.
…
►The functions
satisfy the equation,
…
►The
radial Coulomb wave functions
, solutions of
…
►These, taken together with the infinite sets of bound states for each
, form complete sets.
…