1 files changed, 0 insertions, 79 deletions
diff --git a/lib/nlp_ruby/semirings.rb b/lib/nlp_ruby/semirings.rb
deleted file mode 100644
index fda4683..0000000
--- a/lib/nlp_ruby/semirings.rb
+++ /dev/null
@@ -1,79 +0,0 @@
-# Semirings for directed acyclic graphs (dags) (also directed hypergraphs),
-# as described in:
-# 'Dynamic Programming Algorithms in
-#  Semiring and Hypergraph Frameworks' (Liang Huang)
-class Semiring
-  attr_accessor :add, :multiply, :one, :null, :convert
-end
-
-class BooleanSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| a||b }
-    @multiply =  Proc.new { |a,b| a&&b }
-    @one = true
-    @null = false
-    @convert = Proc.new { |v| true && v!=0 }
-  end
-end
-
-class ViterbiSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| [a,b].max }
-    @multiply =  Proc.new { |a,b| a*b }
-    @one = 1.0
-    @null = 0.0
-    @convert = Proc.new { |v| v }
-  end
-end
-
-class ViterbiLogSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| [a,b].max }
-    @multiply =  Proc.new { |a,b| a+b }
-    @one = 0.0
-    @null = -1.0/0.0
-    @convert = Proc.new { |v| v }
-  end
-end
-
-class InsideSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| a+b }
-    @multiply =  Proc.new { |a,b| a*b }
-    @one = 1.0
-    @null = 0.0
-    @convert = Proc.new { |v| v }
-  end
-end
-
-class RealSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| [a,b].min }
-    @multiply =  Proc.new { |a,b| a+b }
-    @one = 0.0
-    @null = 1.0/0.0
-    @convert = Proc.new { |v| v }
-  end
-end
-
-# for longest/worst paths
-class RealxSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| [a,b].max }
-    @multiply =  Proc.new { |a,b| a+b }
-    @one = -1.0/0.0
-    @null = 0.0
-    @convert = Proc.new { |v| v }
-  end
-end
-
-class CountingSemiring < Semiring
-  def initialize
-    @add = Proc.new { |a,b| a+b }
-    @multiply =  Proc.new { |a,b| a*b }
-    @one = 1.0
-    @null = 0.0
-    @convert = Proc.new { |v| if v!=0 then 1 else 0 end }
-  end
-end
-