FLOOR

Exception in thread "main" java.lang.IllegalArgumentException: No single method:
 floor of interface: clojure.math.numeric_tower.MathFunctions found for function
: floor of protocol: MathFunctions, compiling:(AF/core.clj:84)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6416)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.access$100(Compiler.java:37)
        at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5837)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5572)
        at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5873)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5572)
        at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5873)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5572)
        at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5873)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5572)
        at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5873)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5572)
        at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:5873)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5572)
        at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5008)
        at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3629)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6407)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6397)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.access$100(Compiler.java:37)
        at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:492)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6409)
        at clojure.lang.Compiler.analyze(Compiler.java:6216)
        at clojure.lang.Compiler.analyze(Compiler.java:6177)
        at clojure.lang.Compiler.eval(Compiler.java:6469)
        at clojure.lang.Compiler.load(Compiler.java:6902)
        at clojure.lang.RT.loadResourceScript(RT.java:357)
        at clojure.lang.RT.loadResourceScript(RT.java:348)
        at clojure.lang.RT.load(RT.java:427)
        at clojure.lang.RT.load(RT.java:398)
        at clojure.core$load$fn__4610.invoke(core.clj:5386)
        at clojure.core$load.doInvoke(core.clj:5385)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invoke(core.clj:5200)
        at clojure.core$load_lib.doInvoke(core.clj:5237)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invoke(core.clj:602)
        at clojure.core$load_libs.doInvoke(core.clj:5271)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invoke(core.clj:602)
        at clojure.core$require.doInvoke(core.clj:5352)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at user$eval1.invoke(NO_SOURCE_FILE:1)
        at clojure.lang.Compiler.eval(Compiler.java:6465)
        at clojure.lang.Compiler.eval(Compiler.java:6454)
        at clojure.lang.Compiler.eval(Compiler.java:6431)
        at clojure.core$eval.invoke(core.clj:2795)
        at clojure.main$eval_opt.invoke(main.clj:296)
        at clojure.main$initialize.invoke(main.clj:315)
        at clojure.main$null_opt.invoke(main.clj:348)
        at clojure.main$main.doInvoke(main.clj:426)
        at clojure.lang.RestFn.invoke(RestFn.java:421)
        at clojure.lang.Var.invoke(Var.java:405)
        at clojure.lang.AFn.applyToHelper(AFn.java:163)
        at clojure.lang.Var.applyTo(Var.java:518)
        at clojure.main.main(main.java:37)
Caused by: java.lang.IllegalArgumentException: No single method: floor of interf
ace: clojure.math.numeric_tower.MathFunctions found for function: floor of proto
col: MathFunctions
        at clojure.lang.Compiler$InvokeExpr.<init>(Compiler.java:3302)
        at clojure.lang.Compiler$InvokeExpr.parse(Compiler.java:3509)
        at clojure.lang.Compiler.analyzeSeq(Compiler.java:6411)
        ... 87 more