en.wikipedia.org/wiki/Mathematical_fallacy

In mathematics, certain kinds of mistaken proof are often exhibited, and sometimes collected, .... Many functions do not have a unique inverse. ..... colour as each other, so the group of N + 1 = 2 horses is not necessarily all of the same colour.

en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E2%8B%AF

The infinite series whose terms are the natural numbers 1 + 2 + 3 + 4 + ⋯ is a divergent series. ... Because the sequence of partial sums fails to converge to a finite limit, the series does not have a sum. ... Cesàro summation is a well-known method that sums Grandi's series, the mildly divergent series 1 − 1 + 1 − 1 + ⋯, to 1/2.

mathforum.org/library/drmath/view/57116.html

Oct 3, 1997 ... I'm going to elaborate a bit more, When you divide 6 by 2 what do you .... a=0!) b+ b=b a+a=a false 2b=b 2a=a false 2=1 2=1 false Go through ...

www.math.toronto.edu/mathnet/falseProofs/first1eq2.html

May 26, 1998 ... 1=2: A Proof using Beginning Algebra. The Fallacious Proof: Step 1: Let a=b. Step 2: Then (IMAGE) ,; Step 3: (IMAGE) ,; Step 4: (IMAGE) ...

www.education.com/activity/article/Algebra_Sleuth_Proof_that_1_2

What You Need: Proof that 1 = 2 (see below) ... The rules of mathematics do not allow us to divide by zero. Since a and b are equal, (a-b) = 0. Therefore, we ...

physicsbuzz.physicscentral.com/2014/02/so-what-does-1234-equal-we-give-you_11.html

Feb 11, 2014 ... Casimir's plates do almost something like that, except for vacuum energy instead of air. .... If you are willing to accept the fact that 1-2+3-4+5-.

www.quora.com/Does-1-2-equal-1-4

No, and for these numbers its easy to know becuase they are small numbers. In this case they are not equal, and 1/2 is larger. But as a general ...

www.quora.com/Why-does-1+1-2

What are the biggest tracker networks and what can I do about them? ... This whole experience I communicate through a statement 1+1= 2.