code: public static BigFloat log(BigFloat x) {
  		BigFloat temp = logSpecial(x);
  		return temp != null ? temp : x.context.valueOf(BigDecimalMath.log(x.value, x.context.mathContext));
  	}
docs: Returns the {@link BigFloat} that is <code>log(x)</code>.
  
  @param x the value
  
  @return the resulting {@link BigFloat}
  
  @see BigDecimalMath#log(BigDecimal, MathContext)