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idempotent_semirings_with_zero [2010/07/29 15:46]
127.0.0.1 external edit
idempotent_semirings_with_zero [2013/06/06 21:38] (current)
jipsen
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=====Idempotent semirings with zero===== =====Idempotent semirings with zero=====
-Abbreviation: **ISRng$_0$**+Abbreviation: **ISRng**$_0$
====Definition==== ====Definition====
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$\begin{array}{lr} $\begin{array}{lr}
f(1)= &1\\ f(1)= &1\\
-f(2)= &1\\ +f(2)= &2\\ 
-f(3)= &\\ +f(3)= &12\\ 
-f(4)= &\\ +f(4)= &129\\ 
-f(5)= &\\+f(5)= &1852\\
f(6)= &\\ f(6)= &\\
\end{array}$ \end{array}$