Results 1 to 10 of about 54 (54)

ON NULL CURVES ON SURFACES AND NULL VECTORS IN LORENTZ SPACE

open access: yesSüleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2009
: In this work, we compare the Darboux frame and the Frenet frame of a null curve lying on a spacelike surface in the three-dimensional Lorentz space, and we show that the normal curvature of the curve is a constant.
A. Ceylan ÇÖKEN
doaj  

ON THE DETERMINATION OF A DEVELOPABLE TIMELIKE RULED SURFACE

open access: yesSüleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2009
: This paper gives a method for determining a developable timelike ruled surface by using dual vector calculus. A developable timelike ruled surface can be parameterized in the form m(t, u) =p(t) +u x(t) ( p(t) is called the base curve of m(t, u)).
Mustafa KAZAZ
doaj  

The future is not always open. [PDF]

open access: yesLett Math Phys, 2020
Grant JDE   +3 more
europepmc   +1 more source

Curvature properties of φ-null Osserman Lorentzian S-manifolds

open access: yesOpen Mathematics, 2014
Brunetti Letizia, Caldarella Angelo
doaj   +1 more source

On Bochner flat para-Kählerian manifolds

open access: yesOpen Mathematics, 2005
Łuczyszyn Dorota
doaj   +1 more source

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