Results 241 to 250 of about 210,996 (288)

Pyramids in the complex projective plane

Geometriae Dedicata, 1991
For a metric space \(M\) and a natural number \(n\) the function \(\delta: M^ n\to\mathbb{R}\), \(\delta(x_ 1,\dots,x_ n)=\max_{ij}\hbox{dist}_ M(x_ i,x_ j)\) is called the diameter functional. In a previous paper the author constructed a suitable right inscribed pyramid on a \((2k+1)\)- gon whose set of vertices \(P_ k\) is a local minimum of \(\delta\
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Trigonal‐Pyramidal Tetra‐Sandwich Complexes as 3D NLOphores

European Journal of Inorganic Chemistry, 2008
AbstractThe Negishi cross‐coupling reaction of 1,3,5‐trihalobenzene with ferrocenyl‐ and ruthenocenyllithium, yields the corresponding 1,3,5‐trimetallocenylated benzene derivatives in good yield, when 1,3,5‐triiodobenzene is used. In a subsequent stacking reaction with the cationic (η5‐cyclopentadienyl)ruthenium(II) and (η5‐pentamethylcyclopentadienyl ...
Stefan Steffens, Marc H. Prosenc, Jürgen Heck, Inge Asselberghs, Koen Clays   +4 more
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Low computational complexity hardware implementation of Laplacian Pyramid

2010 18th Iranian Conference on Electrical Engineering, 2010
In this paper a new implementation of the Laplacian Pyramid (LP) algorithm is proposed which uses the polyphase representation and noble identities to facilitate a new pipeline architecture. Our approach saves a large number of mathematical operations which results in the reduction of power consumption.
Seyed Mohammad Ali Zeinolabedin, Nader Karimi, Shadrokh Samavi   +2 more
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Light pyramid, shadow pyramid: Hispanic Baroque and radical complexity

2022
The awareness that a sublunary world exists and, at the same time, that there is a divine principle in that same world, brings to the Spanish baroque system (and its various cohorts of legitimizers) into a modernity that becomes that of an epoch of radical complexity. The metaphor of the pyramids, which can be traced back to Nicholas of Cusa, expresses
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Platinum Complexes of Phospholes with Reduced Pyramidal Character

Phosphorus, Sulfur, and Silicon and the Related Elements, 1999
Abstract The synthesis of planarizcd phospholes showing considerable elcctron delocabtion haw been described.1–3 We now rcport our findings on their complex forming ability with platinum.
László Kollár, Zsolt Csók, György Keglevich   +2 more
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Metal-Assisted Pyramidal Inversion in Metal-Phosphido Complexes

Inorganic Chemistry, 1994
The first systematic theoretical treatment of metal-assisted pyramidal inversion in metal-phosphido complexes is presented. We find that two effects dominate inversion barrier trends. The first effect, which is most important in early transition metal complexes, involves stabilization of the planar form through ligand-to-metal π bonding.
Jimmy R. Rogers, Timothy P. S. Wagner, Dennis S. Marynick   +2 more
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A Nickel Complex Containing a Pyramidalized, Ambiphilic Pincer Germylene Ligand

Chemistry – A European Journal, 2019
AbstractReaction of N‐heterocyclic carbene (NHC)‐stabilized PGeP‐type germylene Ge{o‐(PiPr2)C6H4}2⋅MeIiPr (1) (MeIiPr=1,3‐diisopropyl‐4,5‐dimethylimidazol‐2‐ylidene) with Ni(cod)2 gave pincer germylene complex Ni[Ge{o‐(PiPr2)C6H4}2](MeIiPr) (2), in which the Ge center of 2 is significantly pyramidalized.
Takahito Watanabe, Yumi Kasai, Hiromi Tobita   +2 more
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Complex radiation patterns of dual mode pyramidal horns

IEEE Transactions on Antennas and Propagation, 1977
The radiation patterns of the dual mode horn and its related performance are influenced by the phase difference between component modes at the horn aperture and the phase distribution associated with the horn flare angle. Both effects are shown to deteriorate beam symmetry and increase sidelobe levels.
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Huge Magnetic Anisotropy in a Trigonal-Pyramidal Nickel(II) Complex

Inorganic Chemistry, 2013
The work presented herein shows the experimental and theoretical studies of a mononuclear nickel(II) complex with the largest magnetic anisotropy ever reported. The zero-field-splitting D parameter, extracted from the fits of the magnetization and susceptibility measurements, shows a large value of -200 cm(-1), in agreement with the theoretical value ...
Silvia, Gómez-Coca, Eduard, Cremades, Núria, Aliaga-Alcalde, Eliseo, Ruiz   +3 more
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Crystal and molecular structures of two square-pyramidal rhodium(I)-sulfur dioxide complexes. Bonding effects in pyramidal-sulfur dioxide complexes

Inorganic Chemistry, 1980
The molecular structures of Rh(ttp)Cl(SO/sub 2/) and (Rh(ttp)(CO)(SO/sub 2/)(AsF/sub 6/), where ttp is bis(3-(diphenylphosphino)-propyl)phenylphosphine, have been deduced by single-crystal x-ray diffraction. Both compounds contain square-pyramidal coordination units with apical pyramidal sulfur dioxide ligands. The neutral chloride compound is the most
P. Gary Eller, R. R. Ryan
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