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+*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/solo_couple.html).*
+
+# Tape (`≍`)
+    
+## `≍ 𝕩`: Solo 
+    
+Add a dimension to `𝕩`.
+    
+          ≍ 1
+
+          
+          ≍≍ 1
+
+          
+         ≍≍≍ 1
+
+          
+         ≍≍ 1‿2‿3‿4
+
+          
+         ≍≍≍ 1‿2‿3‿4
+
+    
+    
+## `𝕨 ≍ 𝕩`: Couple
+    
+Join `𝕨` and `𝕩` along a newly created axis.
+    
+           1 ≍ 3
+
+           1‿2 ≍ 2‿3
+
+