Results 191 to 200 of about 1,867 (228)

Koszul differential graded modules

Science in China Series A: Mathematics, 2009
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He, Jiwei, Wu, Quanshui
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Differential Subcarrier Index Modulation

IEEE Transactions on Vehicular Technology, 2018
One of the main challenges in orthogonal frequency division multiplexing (OFDM)–subcarrier index modulation (SIM) systems is the huge amount of resources required to obtain channel state information at the receiver side. In this paper, a differential subcarrier index modulation (DSIM) scheme is proposed, which entirely avoids the need for any channel ...
Saud Althunibat, Raed Mesleh, Ertugrul Basar   +2 more
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Differential perturbations and $ D_\infty$-differential modules

Sbornik: Mathematics, 2001
Let \(K\) be a commutative ring. A \(D_\infty\)-differential module \((X,d^*)\) is a \(K\)-module \(X\) together with a \(D_\infty\) differential, that is a family of \(K\) homomorphisms \(\{d^i:X\to X\), \(i\geq 0\}\) such that \(\sum_{i+j=k} d^id^j =0\), \(\forall k\geq 0\). The author gives some properties of \(D_\infty\)-differential modules (which
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Computations in differential and difference modules

Acta Applicandae Mathematicae, 1989
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Differential étale extensions and differential modules over differential rings

Advances in Applied Mathematics, 2016
An extension of rings \(R/F\) is defined to be formally étale if it satisfies the following lifting property: For all surjective homomorphisms of \(F\)-algebras \(f:A\to S\) whose kernel \(I=\mathrm {ker}(f)\) satisfies \(I^2=0\) and all \(F\)-algebra homomorphisms \(g: R\to S\) there is a lifting of \(g\) to \(h: R\to A\), i.e.
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Differential Modules and Ramification

2004
Differential modules and ramification is the subject of this chapter. With regard to the principal properties of differential modules, we refer to chapter 16 of Eisenbud’s book [63], and add some more results in section 1. After dealing with norms and traces in section 2, we introduce the notion of formally unramified and unramified extensions of rings
K. Kiyek, J. L. Vicente
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Business Module Differentiation

2007
SINA, SOHU, and NETEASE have been regarded as the most successful general Web portals in the Chinese market. However, they have quite different strategies in their business modules, which makes them quite different in terms of their revenue constitution. What are the major reasons and what will be the future direction for Chinese Web portals?
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Change of generators in differential modules

Programming and Computer Software, 2000
A. V. Lapunov, V. A. Mityunin
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A non-commutative differential module approach to Alexander modules

Forum Mathematicum, 2021
Aristides Kontogeorgis
exaly  

Differential six-port modulator

2011 International Conference on Wireless Communications and Signal Processing (WCSP), 2011
Owais Bajpai, Joakim Osth, Shaofang Gong
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