**Q: **Are dimensions used to describe string theory? ¶

**A: **Yes, and the state-space of quantum mechanics is an infinite-dimensional function space.

**Q: **Were dimensions also a key component of the book The Boy Who Reversed Himself by William Sleator? ¶

**A: **Yes.

**Q: **Are dimensions trivial? ¶

**A: **Yes, and it reproduces electromagnetism.

**Q: **Is dimension one of the chief ways the mathematical notion of dimension differs from its common usages? ¶

**A: **Yes.

**Q: **Are dimensions incorporated into many early science fiction stories, appearing prominently, for example, in Miles J? ¶

**A: **Yes, Breuer's The Appendix and the Spectacles and Murray Leinster's The Fifth-Dimension Catapult; and appeared irregularly in science fiction by the 1940s.

**Q: **Is dimension also the dimension of the tangent vector space at any point? ¶

**A: **Yes.

**Q: **Is dimension PoincarĂ© and Einstein's special relativity? ¶

**A: **Yes, and which treats perceived space and time as components of a four-dimensional manifold, known as spacetime, and in the special, flat case as Minkowski space.

**Q: **Are dimensions set by particle experiments such as those at the Large Hadron Collider? ¶

**A: **Yes.

**Q: **Is dimension not restricted to physical objects? ¶

**A: **Yes.

**Q: **Is dimension a dimension of time? ¶

**A: **Yes.

**Q: **Are dimensions said to be universal if all fields are equally free to propagate within them? ¶

**A: **Yes.

**Q: **Is dimension finite if and only if the space's Hamel dimension is finite? ¶

**A: **Yes, and in this case the above dimensions coincide.

**Q: **Is dimension the maximum of the dimensions of its components? ¶

**A: **Yes.

**Q: **Are dimensions equivalent to gauge interactions at long distances? ¶

**A: **Yes.

**Q: **Are dimensions based on the proposition that not more than three lines can intersect at right angles in one point? ¶

**A: **Yes.

**Q: **Is dimension a variant of the same idea? ¶

**A: **Yes.

**Q: **Is dimension one way to measure physical change? ¶

**A: **Yes.

**Q: **Is dimension defined for all metric spaces and? ¶

**A: **Yes, and unlike the dimensions considered above, can also attain non-integer real values.

**Q: **Is dimension useful? ¶

**A: **Yes.