Is there an example of a solvable Lie algebra with non-characteristic nilradical?

It is well-known that the nilradical of a finite-dimensional Lie algebra over a field of characteristic p is not necessarily characteristic (that is, not invariant under all derivations of the...

01 February 2016 3,420 4 View

Does the Research Excellence Framework influence the quality of mathematical research?

There are now periodic assessments of our research in Britain, the latest having been called REF, and I wonder whether they are having an influence on the research we carry out, and, if so,...

08 September 2015 1,826 2 View

Where does the algebraically closed field enter into Block's Theorem?

08 September 2015 6,652 1 View

To what extent is context of fundamental importance in all investigations of axiomatic systems?

Some time ago a reviewer remarked "I am also wondering whether results about all kinds of Lie algebras are what we should be looking for. This is what you do at the earlier stages of a theory, may...

31 December 2014 4,466 5 View

How can we include characteristic p in this work?

11 December 2014 5,833 3 View

When M. I. Kuznetsov refers to a 1-graded Lie algebra in the below paper does he mean Z-graded?

01 February 2014 1,456 3 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

How to classify strictly upper triangular matrices by similarity?

Let F be a field. Consider U, the set of n times n strictly upper triangular matrices in F. For X, Y in U, we call them similar if there exists some S, which is non-degenerate and upper...

01 March 2021 2,957 8 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

How can we simulate an hyperelastic-viscoelastic behavor with Ansys APDL?

I am working on modeling and simulation of biomecanical material behaviour, I have succeded on simulating skin using anisotropic hyperelastic material, on APDL and in our lab's finite element...

28 February 2021 552 3 View

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25 February 2021 5,713 1 View

Modeling viscosity using model of Chung?

Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...

25 February 2021 8,053 5 View

How can I generate random samples from Bingham distribution in R? How can I construct those symmetric matrices?

in the function rbingham(n,A) in R software how can I construct that A (symmetric) matrix?

24 February 2021 3,528 3 View

Satellite orbit estimation using Recurrent Neural Network - what should I use?

Hello, I am a master's student studying in Yonsei Univeristy, Korea. I am trying to estimate the state of satellite, using Neural Network. Below is a simple flow of my study. 1. Train (t0 ~ t1)...

23 February 2021 6,383 3 View

How can I get the coding gene sequences of Hela and U2OS cell lines? Is mRNA sequence of Hsp90 alpha tissue specific??

I am looking for hsp90 mRNA sequence in Hela and U2OS cell lines, I have tried through ncbi but always the output is hsp90 in homo sapiens not in the specific cell line. Kindly, could any one...

22 February 2021 1,853 3 View