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diff --git a/assets/viz/1/clojure/set.cljs b/assets/viz/1/clojure/set.cljs
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index b9ba41f..0000000
--- a/assets/viz/1/clojure/set.cljs
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@@ -1,161 +0,0 @@
-;   Copyright (c) Rich Hickey. All rights reserved.
-;   The use and distribution terms for this software are covered by the
-;   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
-;   which can be found in the file epl-v10.html at the root of this distribution.
-;   By using this software in any fashion, you are agreeing to be bound by
-;   the terms of this license.
-;   You must not remove this notice, or any other, from this software.
-
-(ns ^{:doc "Set operations such as union/intersection."
-       :author "Rich Hickey"}
-       clojure.set)
-
-(defn- bubble-max-key [k coll]
-  "Move a maximal element of coll according to fn k (which returns a number) 
-   to the front of coll."
-  (let [max (apply max-key k coll)]
-    (cons max (remove #(identical? max %) coll))))
-
-(defn union
-  "Return a set that is the union of the input sets"
-  ([] #{})
-  ([s1] s1)
-  ([s1 s2]
-     (if (< (count s1) (count s2))
-       (reduce conj s2 s1)
-       (reduce conj s1 s2)))
-  ([s1 s2 & sets]
-     (let [bubbled-sets (bubble-max-key count (conj sets s2 s1))]
-       (reduce into (first bubbled-sets) (rest bubbled-sets)))))
-
-(defn intersection
-  "Return a set that is the intersection of the input sets"
-  ([s1] s1)
-  ([s1 s2]
-     (if (< (count s2) (count s1))
-       (recur s2 s1)
-       (reduce (fn [result item]
-                   (if (contains? s2 item)
-		     result
-                     (disj result item)))
-	       s1 s1)))
-  ([s1 s2 & sets] 
-     (let [bubbled-sets (bubble-max-key #(- (count %)) (conj sets s2 s1))]
-       (reduce intersection (first bubbled-sets) (rest bubbled-sets)))))
-
-(defn difference
-  "Return a set that is the first set without elements of the remaining sets"
-  ([s1] s1)
-  ([s1 s2] 
-     (if (< (count s1) (count s2))
-       (reduce (fn [result item] 
-                   (if (contains? s2 item) 
-                     (disj result item) 
-                     result))
-               s1 s1)
-       (reduce disj s1 s2)))
-  ([s1 s2 & sets] 
-     (reduce difference s1 (conj sets s2))))
-
-
-(defn select
-  "Returns a set of the elements for which pred is true"
-  [pred xset]
-    (reduce (fn [s k] (if (pred k) s (disj s k)))
-            xset xset))
-
-(defn project
-  "Returns a rel of the elements of xrel with only the keys in ks"
-  [xrel ks]
-    (set (map #(select-keys % ks) xrel)))
-
-(defn rename-keys
-  "Returns the map with the keys in kmap renamed to the vals in kmap"
-  [map kmap]
-    (reduce
-     (fn [m [old new]]
-       (if (contains? map old)
-         (assoc m new (get map old))
-         m))
-     (apply dissoc map (keys kmap)) kmap))
-
-(defn rename
-  "Returns a rel of the maps in xrel with the keys in kmap renamed to the vals in kmap"
-  [xrel kmap]
-    (set (map #(rename-keys % kmap) xrel)))
-
-(defn index
-  "Returns a map of the distinct values of ks in the xrel mapped to a
-  set of the maps in xrel with the corresponding values of ks."
-  [xrel ks]
-    (reduce
-     (fn [m x]
-       (let [ik (select-keys x ks)]
-         (assoc m ik (conj (get m ik #{}) x))))
-     {} xrel))
-   
-(defn map-invert
-  "Returns the map with the vals mapped to the keys."
-  [m] (reduce (fn [m [k v]] (assoc m v k)) {} m))
-
-(defn join
-  "When passed 2 rels, returns the rel corresponding to the natural
-  join. When passed an additional keymap, joins on the corresponding
-  keys."
-  ([xrel yrel] ;natural join
-   (if (and (seq xrel) (seq yrel))
-     (let [ks (intersection (set (keys (first xrel))) (set (keys (first yrel))))
-           [r s] (if (<= (count xrel) (count yrel))
-                   [xrel yrel]
-                   [yrel xrel])
-           idx (index r ks)]
-       (reduce (fn [ret x]
-                 (let [found (idx (select-keys x ks))]
-                   (if found
-                     (reduce #(conj %1 (merge %2 x)) ret found)
-                     ret)))
-               #{} s))
-     #{}))
-  ([xrel yrel km] ;arbitrary key mapping
-   (let [[r s k] (if (<= (count xrel) (count yrel))
-                   [xrel yrel (map-invert km)]
-                   [yrel xrel km])
-         idx (index r (vals k))]
-     (reduce (fn [ret x]
-               (let [found (idx (rename-keys (select-keys x (keys k)) k))]
-                 (if found
-                   (reduce #(conj %1 (merge %2 x)) ret found)
-                   ret)))
-             #{} s))))
-
-(defn subset? 
-  "Is set1 a subset of set2?"
-  [set1 set2]
-  (and (<= (count set1) (count set2))
-       (every? #(contains? set2 %) set1)))
-
-(defn superset? 
-  "Is set1 a superset of set2?"
-  [set1 set2]
-  (and (>= (count set1) (count set2))
-       (every? #(contains? set1 %) set2)))
-
-(comment
-(refer 'set)
-(def xs #{{:a 11 :b 1 :c 1 :d 4}
-         {:a 2 :b 12 :c 2 :d 6}
-         {:a 3 :b 3 :c 3 :d 8 :f 42}})
-
-(def ys #{{:a 11 :b 11 :c 11 :e 5}
-         {:a 12 :b 11 :c 12 :e 3}
-         {:a 3 :b 3 :c 3 :e 7 }})
-
-(join xs ys)
-(join xs (rename ys {:b :yb :c :yc}) {:a :a})
-
-(union #{:a :b :c} #{:c :d :e })
-(difference #{:a :b :c} #{:c :d :e})
-(intersection #{:a :b :c} #{:c :d :e})
-
-(index ys [:b]))
-