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timestamped/2026-03-20_11-40-21.md

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+---
+id: 2026-03-20T11:40:21-04:00
+aliases: []
+title: 2026-03-20 11:40:21
+tags:
+  - authorship/original
+  - destiny/permanent
+  - status/draft
+  - type/periodic/timestamped
+dg-publish: true
+date-created: 2026-03-20T11:40:21-04:00
+daily: "[[2026-03-20]]"
+weekly: "[[2026-W12]]"
+monthly: "[[2026-03]]"
+quarterly: "[[2026-Q1]]"
+yearly: "[[2026]]"
+---
+# 2026-03-20 11:40:21
+
+## Causal Notation
+
+[Causal notation](https://en.wikipedia.org/wiki/Causal_notation)
+may be helpful in illustrating the relationships
+between the quantities listed in
+* [[alternating-current]]
+* [[voltage-drop]]
+* [[conductor-sizing]]
+* [[conduit-sizing]]
+
+> [!quote]
+> $$
+> \begin{gather}
+> s \overset {\rightarrow}{=} a(s) \\
+> s \overset {\leftarrow}{=} b(s)
+> \end{gather}
+> $$
+> 
+> $b(s)$ causes $s$ which in turn causes $a(s)$: $b(s) \overset {\rightarrow}{=} a(s)$
+
+[Bayesian networks](https://en.wikipedia.org/wiki/Bayesian_network)
+are a form of causal notation.