diff --git a/ttmath/ttmathbig.h b/ttmath/ttmathbig.h
index dea7f09..f1b5f93 100644
--- a/ttmath/ttmathbig.h
+++ b/ttmath/ttmathbig.h
@@ -4155,139 +4155,6 @@ public:
 	}
 
 
-	/*!
-		this method compares this and ss2 by ingoring some nBitsToIgnore last bits from mantissas
-		if nBitsToIgnore is 0 then the method is equivalent to EqualWithoutSign() method
-		(signs are not checked, we don't check the NaN flag too)
-
-		sample:
-			Big<1,1> a, b;
-			a = " 1234.5678";
-			b = "-1234.5677999";
-			// binary a:  10011010010.100100010101101101010
-			// binary b: -10011010010.100100010101101101000
-			// two last bits are different
-			if( a.AboutEqualWithoutSign(b, 2) ) // the result is true
-				std::cout << "true" << std::endl;
-
-
-		***warning broken*** doesn't work if 'this' or 'ss2' is zero
-
-
-	*/
-	bool AboutEqualWithoutSign(const Big<exp,man> & ss2, uint ignore_bits = 4) const
-	{
-		TTMATH_ASSERT( ignore_bits < man*TTMATH_BITS_PER_UINT )
-
-		if( IsZero() && ss2.IsZero() )
-			return true;
-
-		if( exponent == ss2.exponent )
-			return AboutEqualExpEqual(mantissa, ss2.mantissa, ignore_bits);
-
-
-		UInt<exp> exp_diff;
-		exp_diff = exponent;
-		exp_diff.Sub(ss2.exponent);
-
-		if( exp_diff == 1 )
-		{
-			// exponent is > ss2.exponent
-			UInt<man> man_diff(mantissa);
-			UInt<man> man_temp(ss2.mantissa);
-			man_temp.Rcr(1, 0);
-			man_diff.Sub(man_temp);
-
-			return AboutEqualZero(man_diff, ignore_bits);
-		}
-		else
-		if( exp_diff == -1 )
-		{
-			// exponent is < ss2.exponent
-			UInt<man> man_diff(ss2.mantissa);
-			UInt<man> man_temp(mantissa);
-			man_temp.Rcr(1, 0);
-			man_diff.Sub(man_temp);
-			
-			return AboutEqualZero(man_diff, ignore_bits);
-		}
-
-		// exp_diff is different from zero, one or minus one
-
-	return false;
-	}
-
-private:
-
-
-	/*!
-		an auxiliary method for calculating AboutEqualWithoutSign()
-		we're using it when exponent is equal ss2.exponent
-	*/
-	bool AboutEqualExpEqual(const UInt<man> & man1, const UInt<man> & man2, uint ignore_bits) const
-	{
-		uint words = ignore_bits / TTMATH_BITS_PER_UINT;
-		uint bits  = ignore_bits % TTMATH_BITS_PER_UINT;
-		uint i;
-
-		if( bits == 0 )
-		{
-			i = words;
-		}
-		else
-		{
-			i = words + 1;
-			uint mask = TTMATH_UINT_MAX_VALUE << bits;
-
-			if( (man1.table[words] & mask) != (man2.table[words] & mask) )
-				return false;
-		}
-
-		for( ; i<man ; ++i )
-		{
-			if( man1.table[i] != man2.table[i] )
-				return false;
-		}
-
-	return true;
-	}
-
-
-	/*!
-		an auxiliary method for calculating AboutEqualWithoutSign()
-	*/
-	bool AboutEqualZero(const UInt<man> & man_diff, uint ignore_bits) const
-	{
-		uint words = ignore_bits / TTMATH_BITS_PER_UINT;
-		uint bits  = ignore_bits % TTMATH_BITS_PER_UINT;
-		uint i;
-
-		if( bits == 0 )
-		{
-			i = words;
-		}
-		else
-		{
-			i = words + 1;
-			uint mask = TTMATH_UINT_MAX_VALUE << bits;
-
-			if( (man_diff.table[words] & mask) != 0 )
-				return false;
-		}
-
-		for( ; i<man ; ++i )
-		{
-			if( man_diff.table[i] != 0 )
-				return false;
-		}
-
-	return true;
-	}
-
-
-public:
-
-
 	bool operator<(const Big<exp,man> & ss2) const
 	{
 		if( IsSign() && !ss2.IsSign() )