So, what is it?(adsbygoogle = window.adsbygoogle || []).push({});

Math assumes non-dimensional points on a number line are separated.

But assumes the points have no distance between them.

If a point has 0 length on a number line, and it is 0 distance from the point beside it, they are the same point. You cannot create a number line with points that have no length and no distance between them.

String theory assumes points have a length on a number line, or that the points are separated by a distance. A distance on a number line is 1 / divided by a number.

Points are only not separate from each other when their size and the distance between them is 1/infinity. Infinities don’t exist in math, so while math incorrectly assumes points with no size can sit directly next to each other, math cannot include an exact idea of infinity.

1/9,000,000,000,000,000, or however many zeroes you want to add is math, so the closest that math can get to dividing down to zero distance and a zero-sized point on a number line is a very small distance and a very short point. In other words, a string.

That is what string theory is.

Given that concept for string theory, now it’s possible to answer a few other interesting questions.

If points are small distances, then the distances can vary, which gives us a space that can stretch, warp, and curve. Now, using that concept of string theory, we can describe a continuum that can change shape, exactly like it is supposed to in Special Relativity.

Einstein began to think in 1936 that there cannot be a continuum, and by 1956 he had privately concluded a continuum is impossible and all of his ideas about gravity are invalid. That incorrect conclusion may be because he correctly realized points cannot have no size and no distance between them, and create the continuum he needed.

-John Cauthen

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# What is string theory?

**Physics Forums | Science Articles, Homework Help, Discussion**