Results 221 to 230 of about 69,869 (259)
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SIAM Journal on Mathematical Analysis, 2002
In this paper, macroelements for spline approximation are constructed on quadrangulations for any prescribed smoothness. The elements depend only on natural derivative information. The dimension of the spline spaces that results is identified in the two main theorems for even and odd degree of smoothness.
Lai, Ming-Jun, Schumaker, Larry L.
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In this paper, macroelements for spline approximation are constructed on quadrangulations for any prescribed smoothness. The elements depend only on natural derivative information. The dimension of the spline spaces that results is identified in the two main theorems for even and odd degree of smoothness.
Lai, Ming-Jun, Schumaker, Larry L.
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Chinese Annals of Mathematics, 2002
Equivalence of several quadrilateral shape regular mesh conditions used in finite element analysis are proved and their influence on the finite element interpolation error studied. The necessity of the bisection condition is emphasized through illustrations.
Ming, Pingbing, Shi, Zhongci
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Equivalence of several quadrilateral shape regular mesh conditions used in finite element analysis are proved and their influence on the finite element interpolation error studied. The necessity of the bisection condition is emphasized through illustrations.
Ming, Pingbing, Shi, Zhongci
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Brahmagupta quadrilaterals are lattice quadrilaterals
Involve, a Journal of MathematicsA Brahmagupta quadrilateral is a cyclic quadrilateral that has integer side and diagonal lengths with an integer area. The authors prove that a Brahmagupta quadrilateral can be placed in the plane with its vertices having rational coordinates and thus integer ones by some rotation, see [\textit{J.
Marshall, Susan H., Tortorelli, Brooke
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Creating Quadrilaterals from Quadrilaterals
The Mathematics Teacher, 2016Students create rules to form new quadrilaterals from existing ones, use dynamic geometry software to construct and make conjectures about these, and attempt to prove their conjectures.
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Journal of Vascular and Interventional Radiology, 2014
The axillary nerve and posterior circumflex humeral artery course posteriorly through the quadrilateral space (Fig 1), an anatomic area bounded by the humerus, teres minor, teres major, and triceps muscles. These neurovascular structures are susceptible to injury or compression, which, if present, may cause shoulder pain, paresthesia, and localized ...
Omar, Zurkiya, T Gregory, Walker
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The axillary nerve and posterior circumflex humeral artery course posteriorly through the quadrilateral space (Fig 1), an anatomic area bounded by the humerus, teres minor, teres major, and triceps muscles. These neurovascular structures are susceptible to injury or compression, which, if present, may cause shoulder pain, paresthesia, and localized ...
Omar, Zurkiya, T Gregory, Walker
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The Journal of Hand Surgery, 1983
This uncommon syndrome is caused by compression of the posterior humeral circumflex artery and axillary nerve or one of its major branches in the quadrilateral space. Forward flexion and/or abduction and external rotation of the humerus aggravate the symptoms. Discrete point tenderness is always found posteriorly in the quadrilateral space.
B R, Cahill, R E, Palmer
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This uncommon syndrome is caused by compression of the posterior humeral circumflex artery and axillary nerve or one of its major branches in the quadrilateral space. Forward flexion and/or abduction and external rotation of the humerus aggravate the symptoms. Discrete point tenderness is always found posteriorly in the quadrilateral space.
B R, Cahill, R E, Palmer
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Computer Methods in Applied Mechanics and Engineering, 2002
The authors consider three degenerate mesh conditions, namely, the conditions of \textit{P. Jamet} [SIAM J.Numer. Anal. 14, 925--930 (1977; Zbl 0383.65009)], \textit{G. Acosta} and \textit{R. G. Duran} [SIAM J. Numer. Anal. 38, 1073--1088 (2000; Zbl 0981.65124)], and \textit{E. Süli} [Math. Comput. 59, 359--382 (1992; Zbl 0767.65072)].
Ming, Pingbing, Shi, Zhong Ci
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The authors consider three degenerate mesh conditions, namely, the conditions of \textit{P. Jamet} [SIAM J.Numer. Anal. 14, 925--930 (1977; Zbl 0383.65009)], \textit{G. Acosta} and \textit{R. G. Duran} [SIAM J. Numer. Anal. 38, 1073--1088 (2000; Zbl 0981.65124)], and \textit{E. Süli} [Math. Comput. 59, 359--382 (1992; Zbl 0767.65072)].
Ming, Pingbing, Shi, Zhong Ci
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SIMULTANEOUS QUADRILATERAL GANGRENE
Archives of Surgery, 1953SIMULTANEOUS quadrilateral gangrene is a rare finding. We are prompted to report this syndrome, since in our total experience we have never previously observed it. Review of the literature reveals a paucity of case reports. These were observed in frost bite, thromboangiitis obliterans, carcinoma, cryoglobulinemia, and endocarditis.
N D, WILENSKY +3 more
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Incyclic-Circumcyclic Quadrilaterals
The Mathematical Gazette, 19551. Let α, β, γ, δ be parameters of four points A, B, C, D on the in-circle x 2 + y 2
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