1=2 (idea)

With the purpose of causing riots and revolts among mathematicans all over the world, I hereby bring forth the proof that 1 = 2.

x=y

multiply by x:
x^2 = xy

subtract y^2:
x^2 - y^2 = xy - y^2

Factor both sides:
(x+y)(x-y) = y(x-y)

Divide by (x-y):
x+y=y

x=y, so substitue y for x:
y+y=y
2y = y

divide by y and we get:
2=1




(You guys just cannot seem to appreciate a small piece of ironic maths, can you?)