गणीताच्या गमति

काहि साईट्स गुगळत असताना खालिल गणीताच्या गमति मिळाल्या..त्या डकवत आहे The following is a "proof" that one equals zero. Consider two non-zero numbers x and y such that x = y. Then x2 = xy. Subtract the same thing from both sides: x2 - y2 = xy - y2. Dividing by (x-y), obtain x + y = y. Since x = y, we see that 2 y = y. Thus 2 = 1, since we started with y nonzero. Subtracting 1 from both sides, 1 = 0.