Update notes/matrices.md

djeada · Copilot · web-flow · commit ecfd7a67bc2c · 2025-09-13T17:47:23.000+02:00
Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;
diff --git a/notes/matrices.md b/notes/matrices.md
@@ -983,6 +983,6 @@ else:
 
 Backtrack over slot assignments; use a trie for prefix feasibility; order by most constrained slot first.
 
-* Time: exponential in slots; strong pruning and good heuristics important.
+* Time: exponential in slots; strong pruning and good heuristics are important.
 
 

Original file line number	Diff line number	Diff line change
`@@ -983,6 +983,6 @@ else:`
`983`	`983`
`984`	`984`	`Backtrack over slot assignments; use a trie for prefix feasibility; order by most constrained slot first.`
`985`	`985`
`986`		`-* Time: exponential in slots; strong pruning and good heuristics important.`
	`986`	`+* Time: exponential in slots; strong pruning and good heuristics are important.`
`987`	`987`
`988`	`988`