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A CTC therefore results in a Cauchy horizon, and a region of spacetime that cannot be predicted from perfect knowledge of some past time. No CTC can be continuously deformed as a CTC to a point (that is, a CTC and a point are not timelike homotopic ), as the manifold would not be causally well behaved at that point.
Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
The theoretical study of time travel generally follows the laws of general relativity. Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), which are theoretical loops in spacetime that might make it possible to travel through time.
To open this safe, you have to replace the question marks with the correct figures. You can find this figure by determining the pattern behind the numbers shown. Answer: 1 and 4. They’re ...
The question is whether or not, for all problems for which an algorithm can verify a given solution quickly (that is, in polynomial time), an algorithm can also find that solution quickly. Since the former describes the class of problems termed NP, while the latter describes P, the question is equivalent to asking whether all problems in NP are ...
A tax credit enables taxpayers to subtract the amount of the credit from their tax liability. [d] In the United States, to calculate taxes owed, a taxpayer first subtracts certain "adjustments" (a particular set of deductions like contributions to certain retirement accounts and student loan interest payments) from their gross income (the sum of all their wages, interest, capital gains or loss ...
The most common form that these questions take is as an arithmetic exercise. A court decision ruled that a mathematical STQ must contain at least three operations to actually be a test of skill. [4] For example, a sample question is "(16 × 5) - (12 ÷ 4)" (Answer: 77).
The question is whether knowing the warden's answer changes the prisoner's chances of being pardoned. This problem is equivalent to the Monty Hall problem; the prisoner asking the question still has a 1 / 3 chance of being pardoned but his unnamed colleague has a 2 / 3 chance.