Added files

graphs/countable_integers.gv

@@ -0,0 +1,29 @@
+digraph {
+	node [shape = plaintext, fontcolor = White, fontsize = 30];
+	rankdir = LR;
+	bgcolor = None;
+	Edge [fontcolor = White, color = White, fontsize = 25];
+
+	subgraph pos {
+		Edge [constraint = False];
+		 0 -> 1 [taillabel = 0];
+		-1 -> 2 [taillabel = 2];
+		-2 -> 3 [taillabel = 4];
+		-3 -> 4 [taillabel = 6];
+		-4 -> 5 [taillabel = 8];
+	}
+	subgraph neg {
+		Edge [constraint = False];
+		1 -> -1 [taillabel = 1];
+		2 -> -2 [taillabel = 3];
+		3 -> -3 [taillabel = 5];
+		4 -> -4 [taillabel = 7];
+		5 -> -5 [taillabel = 9];
+	}
+	subgraph dots {
+		node [label = "..."];
+		d; md;
+	}
+
+	md -> -5 -> -4 -> -3 -> -2 -> -1 -> 0 -> 1 -> 2 -> 3 -> 4 -> 5 -> d [color = None];
+}