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+*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/gradedown_binsdown.html).*
+
+# Del Stile (`⍒`)
+    
+## `⍒ 𝕩`: Grade Down
+    
+Indices of `𝕩` that would sort its major cells in descending order.
+    
+           a ← 1‿2‿3
+
+           ⍒ a
+
+           (⍒a) ⊏ a
+
+    
+    
+## `𝕨 ⍒ 𝕩`: Bins Down
+    
+Binary search for each element of `𝕩` in `𝕨`, and return the index found, if any. 
+    
+## `𝕨` must be sorted in descending order.
+    
+[Right Pervasive.](https://mlochbaum.github.io/BQN/doc/arithmetic.html#pervasion)
+    
+           7‿5‿4‿3 ⍒ 2
+
+           7‿5‿4‿3 ⍒ 2‿6
+
+