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Resolves #1219: Update knuth-optimization.md #1364

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2 changes: 1 addition & 1 deletion src/dynamic_programming/knuth-optimization.md
Original file line number Diff line number Diff line change
Expand Up @@ -143,7 +143,7 @@ assuming the given conditions are satisfied.
dp_{z}(a, c) + dp_{y}(b, d) = C(a, c) + C(b, d) + dp(a, z) + dp(z+1, c) + dp(b, y) + dp(y+1, d).
$$

Using the QI on $C$ and on the dp state for the indices $z+1 \leq y+1 \leq c \leq d$ (from the induction hypothesis) yields the desired result.
Using the QI on $C$ and on the dp state for the indices $a \leq b \leq c \leq d$ (from the induction hypothesis) yields the desired result.

- If $z > y$, the proof of this case is symmetric to the previous case.

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