X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Fmath%2Finteraction.h;h=0fb1f2622298c2b9b741ac6554aa45051644c4c6;hb=bc414e71fa3378400ef3abf2c247c7f0bbac1b66;hp=cd38ae226ea81b6e288c80c6a4aa30aa03e8e066;hpb=76e1b0aef6b1cc3b911c4833565109eaa424f9a5;p=pspp

diff --git a/src/math/interaction.h b/src/math/interaction.h
index cd38ae226e..0fb1f26222 100644
--- a/src/math/interaction.h
+++ b/src/math/interaction.h
@@ -37,6 +37,8 @@ void interaction_destroy (struct interaction *);
 void interaction_add_variable (struct interaction *, const struct variable *);
 void interaction_dump (const struct interaction *);
 void interaction_to_string (const struct interaction *iact, struct string *str);
+bool interaction_is_proper_subset (const struct interaction *x, const struct interaction *y);
+bool interaction_is_subset (const struct interaction *x, const struct interaction *y);
 
 
 struct ccase;