Results 271 to 280 of about 31,741 (316)
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INVERTED DISTANCE AND INVERTED WIENER INDEX
Advances and Applications in Discrete Mathematics, 2016The Wiener index is the sum of distances between all pairs of vertices of a (connected) graph. In this paper, we define two novel graph invariants: the inverted distance and the inverted Wiener index. The inverted distance between any two different vertices u and v of a simple connected graph G is defined as: i(u, v) = D - d(u, v) + 1, where D denotes ...
Cancan, Murat, Ediz, Süleyman
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Unilaterally Invertible Normals are Invertible
The Quarterly Journal of Mathematics, 2001Let \(A\) be a complex unital Banach algebra with unit. An element of \(A\) is hermitian if it has real spatial numerical range when considered as an operator in \(\mathcal L(A)\). An element \(r\) is called normal if there are two hermitian elements \(s, t\) of \(A\) such that \(st = ts\) and \(r = s + it.\) It is shown that every normal element of ...
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Inverting non-invertible labeled trees [PDF]
Australas. J Comb., 2019 Summary: If a graph with non-zero edge weights has a non-singular adjacency matrix, one may use the inverse matrix to define a (weighted) graph that may be viewed as the inverse graph to the original one. It has been known that an adjacency matrix of a weighted tree is non-singular if and only if the tree has a unique perfect matching.
Sona Pavlíková, Jozef Sirán
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The Arithmetic Teacher, 1963
The teaching of the division of fractions has been and continucs to he a conccm of Leachcrs and wri ters in Lhc field of teaching arit hmctic. Should children merely be told to in vert nnd multiply, or should Lhey divide by the common-denominator method, or would some other method better promote learning?
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The teaching of the division of fractions has been and continucs to he a conccm of Leachcrs and wri ters in Lhc field of teaching arit hmctic. Should children merely be told to in vert nnd multiply, or should Lhey divide by the common-denominator method, or would some other method better promote learning?
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The Mathematical Gazette, 1956
The problem of the “tippe-top” has been discussed in several papers, one by Synge makes the assumption of rolling and discovers instability when the axis is vertical with the peg up, but requires as a necessary condition that the top be not a solid of revolution. Since it appears that as far as is constructionally possible the top is axially symmetric,
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The problem of the “tippe-top” has been discussed in several papers, one by Synge makes the assumption of rolling and discovers instability when the axis is vertical with the peg up, but requires as a necessary condition that the top be not a solid of revolution. Since it appears that as far as is constructionally possible the top is axially symmetric,
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Plastic and Reconstructive Surgery, 1980
A method of correction of inverted nipples is presented, which appears to be simple, safe, and effective, leaving little scarring.
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A method of correction of inverted nipples is presented, which appears to be simple, safe, and effective, leaving little scarring.
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ACM Transactions on Graphics, 2018
Once a color image is converted to grayscale, it is a common belief that the original color cannot be fully restored, even with the state-of-the-art colorization methods. In this paper, we propose an innovative method to synthesize invertible grayscale.
Menghan Xia +2 more
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Once a color image is converted to grayscale, it is a common belief that the original color cannot be fully restored, even with the state-of-the-art colorization methods. In this paper, we propose an innovative method to synthesize invertible grayscale.
Menghan Xia +2 more
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Aesthetic Plastic Surgery, 1978
The author presents the anatomic, embryologic, and etiologic aspects and treatment of the inverted nipple.The Pitanguy technique for correction of this deformity consists of direct cutting of the fibromuscular tilts that hold the nipple in an inverted position, by means of a transareolomamillar incision.Associated mammary hypoplasia is corrected by ...
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The author presents the anatomic, embryologic, and etiologic aspects and treatment of the inverted nipple.The Pitanguy technique for correction of this deformity consists of direct cutting of the fibromuscular tilts that hold the nipple in an inverted position, by means of a transareolomamillar incision.Associated mammary hypoplasia is corrected by ...
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The Journal of Philosophy, 1982
Abstract As best I can determine, the idea of spectrum inversion made its first appearance in the philosophical literature when John Locke, in the Essay, entertained the possibility that “the same Object should produce in several Men’s Minds different Ideas at the same time; e.g.
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Abstract As best I can determine, the idea of spectrum inversion made its first appearance in the philosophical literature when John Locke, in the Essay, entertained the possibility that “the same Object should produce in several Men’s Minds different Ideas at the same time; e.g.
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Annals of Otology, Rhinology & Laryngology, 1986
Two hundred twenty-three cases of inverted papilloma seen at this institution over a 35-year period were reviewed. The number of cases steadily increased over each 5-year period. Common presenting signs and symptoms, association with carcinoma, and results of surgical and radiographic treatment are presented. The pathologic controversy surrounding this
M C, Weissler +4 more
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Two hundred twenty-three cases of inverted papilloma seen at this institution over a 35-year period were reviewed. The number of cases steadily increased over each 5-year period. Common presenting signs and symptoms, association with carcinoma, and results of surgical and radiographic treatment are presented. The pathologic controversy surrounding this
M C, Weissler +4 more
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