83 citations · 323 across the 9 of their papers we have counts for
4 papers · 1 filter
An application of neutrix calculus to quantum field theory
Y. Jack Ng, H. van Dam
Neutrices are additive groups of negligible functions that do not contain any constants except 0. Their calculus was developed by van der Corput and Hadamard in connection with asy…
Neutrix Calculus and Finite Quantum Field Theory
Y. Jack Ng, H. van Dam
In general, quantum field theories (QFT) require regularizations and infinite renormalizations due to ultraviolet divergences in their loop calculations. Furthermore, perturbation…
Why 3 + 1 metric rather than 4 + 0 or 2 + 2?
H. van Dam, Y. Jack Ng
Why does the physical 4-dimensional space have a 3 + 1 signature rather than a 4 + 0 or a 2 + 2 for its metric? We give a simple explanation based largely on a group-theoretic argu…
A small but nonzero cosmological constant
Y. Jack Ng, H. van Dam
Recent astrophysical observations seem to indicate that the cosmological constant is small but nonzero and positive. The old cosmological constant problem asks why it is so small;…