Adds a T3NS b
, scaled by the scalar prefactor s
to a T3NS a
.
References syten::T3N::State::add(), syten::STensorImpl::applyCombinator(), syten::T3N::Tree::Node< T >::ndt, syten::T3N::Tree::Tree< T >::Root, SYTEN_ASSERT_DEBUG, and syten::T3N::Tree::Node< T >::v.