can incidence algebras over ring that is not number ring?

asked 4 years ago

Xie
31 ●2 ●5

updated 2 years ago

FrédéricC

5426 ●4 ●44 ●121

I try the following codes, but it does not work.

SF= SymmetricFunctions(QQ) 
s = SF.s() 
I = P.incidence_algebra(SF)
s([2,1])*I[1,1]  
TypeError: unsupported operand parent(s) for *: 'Symmetric Functions over Rational Field in the Schur basis' and 'Incidence algebra of Finite lattice containing 4 elements over Symmetric Functions over Rational Field'

add a comment

1 Answer

Sort by » oldest newest most voted

answered 4 years ago

FrédéricC

5426 ●4 ●44 ●121

Like this

P = posets.PentagonPoset()
SF = SymmetricFunctions(QQ) 
s = SF.s() 
I = P.incidence_algebra(s)
s([2,1])*I[1,1]

This is because SF.s() is another parent.

link

Comments

Thanks! I only use s for computation and do not know s can be used as a ring.

Xie ( 4 years ago )

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower

Stats

Asked: 4 years ago

Seen: 258 times

Last updated: Jul 14 '20

can incidence algebras over ring that is not number ring? savecancel