diff --git a/src/main/clojure/conexp/fca/contexts.clj b/src/main/clojure/conexp/fca/contexts.clj
index 805fc8d2..1d7c558e 100644
--- a/src/main/clojure/conexp/fca/contexts.clj
+++ b/src/main/clojure/conexp/fca/contexts.clj
@@ -765,6 +765,17 @@
                         (I_2 [g_2,m_2])))]
     (make-context-nc new-objs new-atts new-inz)))
 
+(defn context-boolean-matrix-product [ctx1 ctx2]
+  "Computes a context in the form of the boolean matrix product of both contexts.
+   The contexts need to have appropriate dimensions and the set of attributes of *ctx1*
+   must be equal to the set of objects of *ctx2*."
+  (make-context (objects ctx1)
+                (attributes ctx2)
+                (fn [g m] (not= (intersection (object-derivation ctx1 #{g})
+                                              (attribute-derivation ctx2 #{m}))
+                                #{})))
+)
+
 ;;; Neighbours in the concept lattice with Lindig's Algorithm
 
 (defn direct-upper-concepts
diff --git a/src/main/clojure/conexp/fca/matrix_factorizations.clj b/src/main/clojure/conexp/fca/matrix_factorizations.clj
index abe8848d..97ba68a5 100644
--- a/src/main/clojure/conexp/fca/matrix_factorizations.clj
+++ b/src/main/clojure/conexp/fca/matrix_factorizations.clj
@@ -6,17 +6,6 @@
               [conexp.fca.lattices :refer :all]
               [conexp.fca.implications :refer [support frequent-itemsets]]))
 
-(defn factor-context-product [ctx1 ctx2]
-  "Computes a context in the form of the boolean matrix product of both contexts.
-   The contexts need to have appropriate dimensions and the set of attributes of *ctx1*
-   must be equal to the set of objects of *ctx2*."
-  (make-context (objects ctx1)
-                (attributes ctx2)
-                (fn [g m] (not= (set/intersection (object-derivation ctx1 #{g})
-                                                  (attribute-derivation ctx2 #{m}))
-                                #{})))
-)
-
 (defprotocol context-factorization-record
   (object-factor-context [this] "Returns the formal context representing the object-factor relation.")
   (factor-attribute-context [this] "Returns the formal context representing the factor-attribute relation.")
@@ -26,7 +15,7 @@
   context-factorization-record
   (object-factor-context [this] obj-fac-ctx)
   (factor-attribute-context [this] fac-attr-ctx)
-  (product-context [this] (factor-context-product obj-fac-ctx fac-attr-ctx))
+  (product-context [this] (context-boolean-matrix-product obj-fac-ctx fac-attr-ctx))
 )
 
 
@@ -130,16 +119,6 @@
                (* ((M1 r) c) ((M2 r) c))))))
 )
 
-(defn factor-context-product [ctx1 ctx2]
-  "Computes a context in the form of the boolean matrix product of both contexts.
-   The contexts need to have appropriate dimensions and the set of attributes of *ctx1*
-   must be equal to the set of objects of *ctx2*."
-  (make-context (objects ctx1)
-                (attributes ctx2)
-                (fn [g m] (not= (set/intersection (object-derivation ctx1 #{g})
-                                                  (attribute-derivation ctx2 #{m}))
-                                #{})))
-)
 
 (defn- contexts-from-factors [factors objects attributes]
   "Computes contexts from set of factor concepts."