query: Why are extra timelike dimensions seldom considered?
positive_passages.docid: 148392
positive_passages.text: Has the concept of non-integer $(n+m)$-dimensional spacetime ever been investigated by theoretical physicists?
negative_passages.docid: 72416
negative_passages.text: The universe appears to have a lower bound in the time dimension, why not an upper bound?
negative_passages.docid: 21628
negative_passages.text: What is the definition of a timelike and spacelike singularity?
negative_passages.docid: 93336
negative_passages.text: Understanding time crystals
negative_passages.docid: 47959
negative_passages.text: Is the collapse of the wave function inherently time asymmetric?
negative_passages.docid: 155208
negative_passages.text: Why aren't Christoffel symbols tensors? - asked from a fibre bundle perspective
negative_passages.docid: 76637
negative_passages.text: Why aren't particles constantly "measured" by the whole universe?
negative_passages.docid: 52827
negative_passages.text: Could negative dimension ever make sense?
negative_passages.docid: 26769
negative_passages.text: Why does string theory require 9 dimensions of space and one dimension of time?
negative_passages.docid: 86423
negative_passages.text: Dimension & non - locality problem in string theory
negative_passages.docid: 55534
negative_passages.text: Why one-dimensional strings, but not higher-dimensional shells/membranes?
negative_passages.docid: 107327
negative_passages.text: Why do extraneous solutions exist?
negative_passages.docid: 42258
negative_passages.text: Is time dilation an illusion?
negative_passages.docid: 113249
negative_passages.text: Does time exist in a vacuum?
negative_passages.docid: 44239
negative_passages.text: Why the extra term $\frac{1}{2}(\partial_{\rho}A^{\rho})^2$ in the photon Lagrangian?
negative_passages.docid: 27198
negative_passages.text: Not an essential singularity
negative_passages.docid: 76819
negative_passages.text: How does "warp drive" not violate Special Relativity causality constraints?