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opencog-evidence commits / facf092

Boltzmann sums
facf092c0360209be2e109a359e76b8614262ea8
by Linas Vepštas <linasvepstas@gmail.com> · 2025-04-17T23:11:16.000Z

Changed files (1) +31 -1

aggregate.lyx +31 -1
……@@ -584,7 +584,37 @@ The sum ranges over all possible connected graphs over the words in the
584584\end_layout
585585
586586\begin_layout Standard
587Here, we arrive at the next stumbling block
587Here, we arrive at the next stumbling block.
588 Is it correct to call
589\begin_inset Formula $h\left(G\right)$
590\end_inset
591
592 the energy, or is it something else? The above has the classic form of
593 a superposition.
594 If we interpret a single graph to be a
595\begin_inset Quotes eld
596\end_inset
597
598state
599\begin_inset Quotes erd
600\end_inset
601
602, then the above is a superposition of states, and
603\begin_inset Formula $H\left(S\right)$
604\end_inset
605
606 should be interpreted as the partition function, and not the energy.
607 For partition functions, the appropriate notation would be a Boltzmann
608 sum:
609\begin_inset Formula
610\[
611Z_{\beta}=\sum_{G\in\mathcal{G}}e^{-\beta h\left(G\right)}
612\]
613
614\end_inset
615
616So, which is it? I'm confused, here.
617
588618\end_layout
589619
590620\begin_layout Section*