Results 51 to 60 of about 3,388 (272)

The invariants of the second symmetric power representation of SL_2(F_q) [PDF]

open access: yes, 2011
For a prime p>2 and q=p^n, we compute a finite generating set for the SL_2(F_q)-invariants of the second symmetric power representation, showing the invariants are a hypersurface and the field of fractions is a purely transcendental extension of the ...
R. James Shank   +4 more
core   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

open access: yesAdvanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero   +12 more
wiley   +1 more source

Jordan isomorphisms of upper triangular matrix rings

open access: yesLinear Algebra and its Applications, 2007
A bijective additive map of rings \(g\colon A\to B\) is a Jordan isomorphism if for all \(x,y\in A\), \(g(xy+yx)=g(x)g(y)+g(y)g(x)\). The authors generalize results in the literature that show when such a map is a ring isomorphism or anti-isomorphism. They consider a Jordan isomorphism \(g\colon S\to B\) for \(S\) the ring of upper triangular \(n\times
Liu, Cheng-Kai, Tsai, Wan-Yu
openaire   +2 more sources

3D Printing Innovations in Polymeric Porous and Patterned Architecture

open access: yesAdvanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil   +13 more
wiley   +1 more source

An Introduction to i-Commutative Rings

open access: yesMathematics
In this paper, we introduce a new class of rings, called i-commutative rings, by extending the concept of commutative-like rings using idempotent elements.
Muhammad Saad   +3 more
doaj   +1 more source

Isomorphisms between strongly triangular matrix rings

open access: yesLinear Algebra and its Applications, 2013
We describe isomorphisms between strongly triangular matrix rings that were defined earlier in Berkenmeier et al. (2000) as ones having a complete set of triangulating idempotents, and we show that the so-called triangulating idempotents behave analogously to idempotents in semiperfect rings.
Ánh, P. N., van Wyk, L.
openaire   +2 more sources

Hochschild Cohomology of Triangular Matrix Algebras [PDF]

open access: yes, 2000
We study the Hochschild cohomology of triangular matrix rings B=R0AMRA , where A and R are finite dimensional algebras over an algebraically closed field K and M is an A-R-bimodule.
Platzeck, Marı́a Inés   +2 more
core   +1 more source

In Situ Crystalline‐Amorphous Composite Oxide Structure Suppressing Thermal Wear Instability for Refractory Multi‐Principal Element Alloy

open access: yesAdvanced Functional Materials, EarlyView.
An effective strategy is developed to overcome the medium temperatures wear resistance degradation in refractory multi‐principal element alloys. By utilizing chemical short‐range ordering to trigger oxygen‐induced amorphization, a composite oxide structure is formed, which combines high hardness with robust stiffness.
Xuhui Pei   +7 more
wiley   +1 more source

Matrix rings with summand intersection property [PDF]

open access: yes, 2003
summary:A ring $R$ has right SIP (SSP) if the intersection (sum) of two direct summands of $R$ is also a direct summand. We show that the right SIP (SSP) is the Morita invariant property.
Tercan, A.   +3 more
core   +1 more source

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