--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/+blockmatrix/zero.m	Fri Sep 07 14:40:58 2018 +0200
@@ -0,0 +1,20 @@
+% Creates a block matrix according to the division with zeros everywhere.
+function bm = zero(div)
+    if ~blockmatrix.isDivision(div)
+        error('div is not a valid division');
+    end
+
+    n = div{1};
+    m = div{2};
+
+    N = length(n);
+    M = length(m);
+
+    bm = cell(N,M);
+
+    for i = 1:N
+        for j = 1:M
+            bm{i,j} = sparse(n(i),m(j));
+        end
+    end
+end