1 files changed, 33 insertions, 0 deletions
diff --git a/help/deduplicate_find.md b/help/deduplicate_find.md
new file mode 100644
index 00000000..631638c4
--- /dev/null
+++ b/help/deduplicate_find.md
@@ -0,0 +1,33 @@
+*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/deduplicate_find.html).*
+
+# Epsilon Underbar (`⍷`)
+    
+## `⍷ 𝕩`: Deduplicate
+    
+Unique major cells of `𝕩`.
+    
+           ⍷ 4‿5‿6‿6‿4‿7‿5
+
+           a ← 3‿3 ⥊ ↕6
+
+           ⍷ a
+
+    
+    
+## `𝕨 ⍷ 𝕩`: Find
+    
+Mark the top left location of the occurrences of `𝕨` in `𝕩` with a 1, and other locations with 0.
+    
+Result is the same shape as `(≢𝕨)↕x`.
+    
+           "string" ⍷ "substring"
+
+           "loooooong" ⍷ "short"
+
+           a ← 7 (4|⋆˜)⌜○↕ 9
+
+           b ← (0‿3‿0≍0‿1‿0)
+
+           b ⍷ a
+
+