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-rw-r--r--controle-20160421.tex4
1 files changed, 2 insertions, 2 deletions
diff --git a/controle-20160421.tex b/controle-20160421.tex
index 8720f49..4360c6b 100644
--- a/controle-20160421.tex
+++ b/controle-20160421.tex
@@ -642,9 +642,9 @@ de l'exercice \ref{game-for-nim-product}.
\smallbreak
-(3) (b) Montrer que si $\alpha'\neq\alpha$ et $\beta'\neq\beta$, alors
+(3) (a) Montrer que si $\alpha'\neq\alpha$ et $\beta'\neq\beta$, alors
$(\alpha'\otimes\beta) \oplus (\alpha\otimes\beta') \oplus
-(\alpha'\otimes\beta') \neq \alpha\otimes\beta$.\spaceout (a) En
+(\alpha'\otimes\beta') \neq \alpha\otimes\beta$.\spaceout (b) En
déduire que si $\alpha\otimes\beta = \alpha\otimes\beta'$ alors
$\alpha=0$ ou bien $\beta=\beta'$.