Results 1 to 10 of about 120 (112)

WEYL COLLINEATIONS THAT ARE NOT CURVATURE COLLINEATIONS [PDF]

open access: yesInternational Journal of Modern Physics D, 2005
Though the Weyl tensor is a linear combination of the curvature tensor, Ricci tensor and Ricci scalar, it does not have all and only the Lie symmetries of these tensors since it is possible, in principle, that "asymmetries cancel." Here we investigate if, when and how the symmetries can be different.
Hussain, Ibrar   +2 more
openaire   +3 more sources

Plane Collineations [PDF]

open access: yesEdinburgh Mathematical Notes, 1960
If in a complex projective plane a point P , with coordinate vector x , corresponds to a point p *, with coordinate vector x *, under a non-singular collineation, then
openaire   +1 more source

Treacher collins syndrome

open access: yesBritish Journal of Plastic Surgery, 1950
Summary Two cases of Treacher Collins syndrome are reported. The family history is shown to be variable, but there appears to be a distinct familial incidence. A comparison has been drawn between the Treacher Collins syndrome and unilateral facial agenesis. The embryology is discussed, and it has been suggested that the causative factor may influence
openaire   +2 more sources

FRANK COLLINS BAKER

open access: yesScience, 1942
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +3 more sources

Reply to Collins and Altman [PDF]

open access: yesEuropean Journal of Cardio-Thoracic Surgery, 2012
We are pleased that EuroSCORE II [1] continues to generate interest and are happy to respond to concerns about its development and evaluation [2]. We find very little to disagree with in the points raised by Collins and Altman [3], but are not convinced that their suggested alternative analysis would have resulted in materially different results.
Linda D, Sharples, Samer A M, Nashef
openaire   +2 more sources

An Algorithm for the Factorization of Split Quaternion Polynomials. [PDF]

open access: yesAdv Appl Clifford Algebr, 2021
Scharler DF, Schröcker HP.
europepmc   +1 more source

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