We derive twistorial tensionful bosonic string action by considering on the world sheet the canonical twistorial 2–form in two–twistor space. We demonstrate the equivalence of or model to two known momentum formulations of D = 4 bosonic string, with covariant worldsheet vectorial string momenta P m μ (τ, σ) and the one with tensorial string momenta P[μν](τ, σ). All considered here string action...

Given two points in a plane, each with a prescribed direction of motion in it, the question being asked is to find the shortest smooth path of bounded curvature that joins them. The classical 1957 result by Dubins gives a sufficient set of paths (each consisting of circular arcs and straight line segments) which always contains the shortest path. The latter is then found by explicitly computing...

Poetic submission for special issue, "Hip hop and libraries," volume 6, issue 1/2, 2022.

We shall here discuss a new spacetime gauge-covariant Lagrangian formulation of General Relativity by means of the Barbero-Immirzi SU(2)-connection on spacetime. To the best of our knowledge the Lagrangian based on SU(2) spacetime fields seems to appear here for the first time.

California’s failure in restructuring its electricity market has been interpreted to mean that “deregulation will not work.” A number of studies have pointed to flaws in the California experience that -if corrected -should allow restructuring to be successful. This study compares the California experience with the actual, successful experience of several other states/countries to identify what ...