Module: MathSymbols::MathExtensions

Included in:
Math, Object
Defined in:
lib/math_symbols/math_extensions.rb

Instance Method Summary collapse

Instance Method Details

#Γ(value) ⇒ Object 



19
20
21
 
# File 'lib/math_symbols/math_extensions.rb', line 19

def Γ(value)
  Math.gamma value
end

#δ(value) ⇒ Object 



31
32
33
 
# File 'lib/math_symbols/math_extensions.rb', line 31

def δ(value)
  value.zero? ? ∞ : 0
end

#π ⇒ Object 



23
24
25
 
# File 'lib/math_symbols/math_extensions.rb', line 23

def π
  Math::PI
end

#∏(enumerable) ⇒ Object 



9
10
11
12
13
 
# File 'lib/math_symbols/math_extensions.rb', line 9

def ∏(enumerable)
  enumerable.inject 1 do |acc, x|
    acc * yield(x)
  end
end

#∑(enumerable) ⇒ Object 



3
4
5
6
7
 
# File 'lib/math_symbols/math_extensions.rb', line 3

def ∑(enumerable)
  enumerable.inject 0 do |acc, x|
    acc + yield(x)
  end
end

#√(value) ⇒ Object 



15
16
17
 
# File 'lib/math_symbols/math_extensions.rb', line 15

def √(value)
  Math.sqrt value
end

#∞ ⇒ Object 



27
28
29
 
# File 'lib/math_symbols/math_extensions.rb', line 27

def ∞
  Float::INFINITY
end