en.wikipedia.org/wiki/Mathematical_fallacy

In mathematics, certain kinds of mistaken proof are often exhibited, and sometimes collected, ... 1 Howlers; 2 Division by zero; 3 Multivalued functions; 4 Calculus; 5 Power and root. 5.1 Positive and negative roots; 5.2 Squaring both sides of an ...

mathforum.org/library/drmath/view/56734.html

Date: 11/19/95 at 17:12:23 From: Doctor Ken Subject: Re: 1+1 = 3 ? Hello! Let me say first of all that there is no real proof for the statement 1 + 1 ...

mathforum.org/dr.math/faq/faq.false.proof.html

What's wrong with proofs that say 1+1=1 or 2=1? ... Here's one from the Dr. Math archives: "Proof" that 1 + 1 = 1. a = 1 b = 1. a = b a2 = b ... 4 - 6 + 9/4 = 1 - 3 + 9/4

puzzling.stackexchange.com/questions/5656/when-does-11-3

edited Nov 28 '14 at 16:40 · warspyking. 6,821445116. asked Nov 27 '14 at 19:04 . josh. 15113 ... I have a mathematical proof for you: Start with the following ...

www.quora.com/How-can-you-prove-that-1+1-3

First of all, let me tell you that there is no real proof for the statement 1 + 1 = 3. You cannot use correct mathematics to prove an incorrect statement. However, there ...

math.stackexchange.com/questions/278974/prove-that-11-2

Usually, it is defined to be that 2:=1+1, 3:=1+1+1, etc. ... set of axioms that can prove 1+1=2 much more easily than Whitehead and Russell do.

www.quickanddirtytips.com/education/math/how-to-prove-that-1-2

May 16, 2014 ... What if I was to tell you that I could prove that 1 + 1 is actually equal to 1. And that .... Audio. 3 Frequently Asked Questions About Math Puzzles.

www.physicsforums.com/threads/proof-of-1-1-2.58069

The difficulties in proving that 1+1 = 2 or one plus one is two stems ... For example if in school the kid were taught that 1+1=3 and 1+3=2 (that is ...

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

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) ,; Step 5: (IMAGE) ...