id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
13399 Fixes to symmetric functions Anne Schilling Sage Combinat CC user "This patch implements the following fixes to symmetric functions:
- HL creation operator for k-Schur functions
- it fixes omega for k-Schur functions for generic t
- it changes the multiplication for k-Schur functions for generic t, so that
the result stays in the k-bounded subspace if possible and lifts to symmetric functions otherwise
- it moves coproduct_by_coercion to SymmetricFunctionAlgebra_generic and
inserts a coproduct function in KBoundedSubspaceBases, ElementMethods
- it fixes the coersion between the Jack P and Pq basis; this was previously extremely slow,
for example for
{{{
sage: Sym = SymmetricFunctions(FractionField(QQ['t']))
sage: Qp = Sym.jack().Qp()
sage: P = Sym.jack().P()
sage: P(Qp[2,1])
((-192*t^3+192*t^2-192*t+192)/(-64*t^3-224*t^2-224*t-64))*JackP[1, 1, 1]
+ ((128*t^2-64*t+80)/(64*t^2+64*t+16))*JackP[2, 1] + ((8*t-8)/(8*t+4))*JackP[3]
}}}
- it fixes the coproduct for Jack symmetric functions
'''Apply''':
* [attachment:trac_13399-sf-as.3.patch]
" defect closed major sage-5.4 combinatorics fixed symmetric functions Sage Combinat CC user Mike Zabrocki sage-5.4.beta2 Anne Schilling, Mike Zabrocki Mike Zabrocki, Anne Schilling N/A #13404