Method: Variable#__derivative__

Defined in:
lib/symcalc.rb

#__derivative__(variable: nil) ⇒ Object 



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# File 'lib/symcalc.rb', line 308

def __derivative__ variable: nil
	if variable == nil || variable == self
		return EquationValue.new 1
	else
		return to_equation(0)
	end
end