--- a/lib/strokedb/core_ext.rb
+++ b/lib/strokedb/core_ext.rb
@@ -5,4 +5,5 @@ require 'core_ext/symbol'
 require 'core_ext/enumerable'
 require 'core_ext/hash'
 require 'core_ext/fixnum'
+require 'core_ext/float'
 require 'core_ext/blank'
\ No newline at end of file

--- /dev/null
+++ b/lib/strokedb/core_ext/float.rb
@@ -0,0 +1,4 @@
+class Float
+  ::Infinity = 1.0 / 0.0 unless defined? ::Infinity
+  ::NaN      = 0.0 / 0.0 unless defined? ::NaN
+end

--- /dev/null
+++ b/spec/lib/strokedb/core_ext/float_spec.rb
@@ -0,0 +1,62 @@
+require File.dirname(__FILE__) + '/spec_helper'
+
+describe Infinity do
+
+  it "should correctly compare with integers and floats" do
+    Infinity.should > 1
+    Infinity.should > 1.0
+  end
+    
+  it "should correctly work with ranges" do
+    (-Infinity..1).should include(-100)
+    (-Infinity..Infinity).should include(Float::MAX)
+    (0..Infinity).should include(Float::MAX)
+  end
+  
+  it "should return Infinity in arithmetics" do
+    (Infinity + Infinity).should == Infinity
+    (Infinity * Infinity).should == Infinity
+    (Infinity ** Infinity).should == Infinity
+    (Infinity / 0).should == Infinity
+    (Infinity / 0.0).should == Infinity
+  end
+  
+  it "should return NaN in arithmetics" do
+    (Infinity - Infinity).should be_nan
+    (Infinity / Infinity).should be_nan
+    (Infinity * 0).should be_nan
+    (Infinity * 0.0).should be_nan
+  end
+  
+end
+
+describe NaN do
+  
+  it "should correctly compare with numerics" do
+    (NaN < 1).should be_false
+    (NaN > 1).should be_false
+    (NaN == 1).should be_false
+  end
+  
+  it "should not compare with itself" do
+    NaN.should_not == NaN
+    NaN.should be_nan
+    NaN.object_id.should == NaN.object_id
+    (NaN + 1).object_id.should_not == NaN.object_id
+  end
+
+  it "should produce NaN in all the operations except NaN**0 == 1" do
+    (NaN + 1).should be_nan
+    (NaN + Infinity).should be_nan
+    (NaN - 1).should be_nan
+    (NaN * 0).should be_nan
+    (NaN * Infinity).should be_nan
+    (NaN ** 0).should == 1  # <-- WTF?  (Ruby 1.8.6 rel. 2007-03-13)
+    (NaN ** 1).should be_nan
+    (NaN ** Infinity).should be_nan
+    (NaN / 0).should be_nan
+    (NaN / 1).should be_nan
+    (NaN / Infinity).should be_nan
+  end
+  
+end