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semirings [2013/06/06 21:18]
jipsen
semirings [2019/03/14 16:46] (current)
jipsen
Line 48: Line 48:
$\begin{array}{lr} $\begin{array}{lr}
f(1)= &1\\ f(1)= &1\\
-f(2)= &1\\ +f(2)= &10\\ 
-f(3)= &\\ +f(3)= &132\\ 
-f(4)= &\\+f(4)= &2341\\
f(5)= &\\ f(5)= &\\
f(6)= &\\ f(6)= &\\
Line 57: Line 57:
====Subclasses==== ====Subclasses====
[[Idempotent semirings]] [[Idempotent semirings]]
 +
 +[[Semirings with identity]]
 +
 +[[Semirings with zero]]
====Superclasses==== ====Superclasses====