I think my post is a bit long and a lot of hassle lately. Today I will make a basic article. This is for website refreshment as well. Happy reading.
Most people use the equivalent method to prove mathematical statements. Even to prove the error of a statement. Though there are other ways to prove error statement, ie with an example of denial. This is considered sufficient because a statement must be perfect. Also because the truth must be perfect in mathematics.
Suppose there is a statement “If then is prime”. Suppose we want to deny the statement. We have a presumption that not always prime. Then simply indicated there is a number such that is not prime. For this case, we take then is not prime. This example is sufficient to prove that the above statement is false.
Thanks for reading.