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Unless the item has no parent, its position is in parent coordinates (i.e., the parent's local coordinates). Parent items propagate both their position and their transformation to all children. Transformation QGraphicsItem supports projective transformations in addition to its base position, pos()...
It is an open question whether or not a left (or two-sided) S... Yufei Xiao - 《Communications in Algebra》 被引量: 22发表: 1994年 Infinite groups with Abelian centralizers of involutions The article contains two characterizations of projective linear groups PGL2(P) over a locally finite...
is simple, write \(p(m)\) for the projective cover of \(m\) . we often use the dimensions of simple \(kh\) -modules to label them, rather than give them special names. for example, if \(h\) has simple modules of dimensions 1, 5, 5, 5, 10 and 10, with only the 1- and...
Another modularization method is by representing the density matrix as sums of projectors. In this case, modules are given by disjoint sets of projectors (see Exman and Shmilovich [13]). • Projective Measurements—projective measurements are one of the well-known kinds of quantum measurements, ...
asanR–module,ofeverymodule–finiteextensionring,see[Ma]. InthecasethatRcontainsthefieldofrationalnumbers,itiseasilyseen thatRissplinterifandonlyifitisanormalring,butthenotionismore subtleforringsofcharacteristicp>0.ItisknownthatF–regularrings ofcharacteristicparesplinters,andHochsterandHunekeshowedthat...
AleftS-module GF(q):Galoisfieldwithqelements Z q :Ringofintegersmodulom Z p s:Ringofintegersmodulop s U:SetofallunitsofZ p s Z:SetofallzerodivisorsofZ p s ⌊x⌋:Greatestintegerlessthanorequaltox ⌈x⌉:Smallestintegergreaterthanorequaltox x:ElementofF n q w H (x):Hamming...
Inductive limits of projective C*-algebras We show that a separable C*-algebra is an inductive limits of projective C*-algebras if and only if it has trivial shape, that is, if it is shape equivalent to the zero C*-algebra. In particular, every contractible C*-algebra is an induc......
Rings whose finitely generated right ideals are quasi-projective : Discrete Mathematics and Applications An invariant ring A is arithmetical if and only if every finitely generated ideal M of the ring A is a quasi-projective A-module and every endomorphism of ... Tuganbaev,A Askar - 《Discrete...
This technique is a form of multiplicative masking: in our case, a non-zero element r∈F2127−1 is applied to points (X, Y, Z) in homogeneous projective coordinates to obtain the equivalent randomized tuple (r⋅X,r⋅Y,r⋅Z). Protected ECDH Key Exchange. In order to use ...