A38 == Sounds like something my students would write. Anyway, maybe it's something like this:Given vectors y and z, find the vector x (in some subspace?) such that ??---Selwyn HollisReply-To: kuska@informatik.uni-leipzig.de ==== Hi,why not sayQuit[]in the last input cell of your notebook ? Jens ==== I think the real solution is to put a statement in the very first cell (andmake that cell an initialization cell) to clear all variables. The neteffect is the same, namely the next time you use that notebook, allvariables are cleared. Or have I missed some subtlety?- Eric.-- ==== There is never a single right solution. There are always multiplewrong ones, though. ==== As Jens-Peer Kuska and Andrzej Kozlowski both hypothesized, unpacking isthe issue. Specifically, this is done by Inner. One can improve speedfor this sort of computation by using operations that do not need tounpack.In[3]:= x = Table[2.,{i,100000}];In[4]:= y = Table[If[i<1000000,2.,i],{i,100000}];In[5]:= Timing[Inner[Divide,x,x]]Out[5]= {0.27 Second, 100000.}In[6]:= Timing[Inner[Divide,y,y]]Out[6]= {0.16 Second, 100000.}In[7]:= Timing[Apply[Plus,x/x]]Out[7]= {0.06 Second, 100000.}In[8]:= Timing[Apply[Plus,y/y]]Out[8]= {0.12 Second, 100000.}Daniel LichtblauWolfram ResearchReply-To: kuska@informatik.uni-leipzig.de ==== Hi,if InputForm[] doe not help you, you canUnprotect[Times]Format[Times[a_, b_], StandardForm] := SequenceForm[a, *, b]Protect[Times]to get the * symbol back. Jens ==== Jonathan Mann wanted to have a muliplication sign used when the result ofthe following is displayed.In[1]:= 40 (8)^tOut[1] 5 8^(1+t)--------------You can evaluate the following to make things work the way you want.In[2]:= MakeBoxes[n_Integer*m_Integer^pow_,form_]:= RowBox[{ToString[n],*,SuperscriptBox[ToString[m],MakeBoxes[ pow,form]]}]-------------If you put this line of code in your (init.m) file it will evaluate everytime Mathematica is launched. Ted ErsekDownload my collection of Mathematica tricks from: http://www.verbeia.com/mathematica/tips/Tricks.htmland http://www.verbeia.com/mathematica/tips/GraphicsTricks.html== ==In particular, Ted Ersek said something that interested me. However, I tried to put it in my init.m file and it didn't work. Could someone please elaborate on the location of this file and suggestions on the best line of code to do the job.Jonathan Mannmtheory@msn.com ==== Dear extrabyteI have read your post to MathGroup and, to give a glance to the matter, I would like to receive the notebook your web page was generated from. Please, can you send it to me as an attach ? That's for avoid retyping it. Which Mathemathica version have you got the trouble from ?Scusa, ho il sospetto che tu sia italiano. Mi sbaglio ?Nicola Avaglianonicolaus_ava@yahoo.itReply-To: Anthony.C.Iannetti@grc.nasa.gov ==== Dear Mathematica users, I do I find the jacobian resulting from the Newton method for solvingsimultaneous nonlinear equations? I realize the FindRoot[] can solvethe system for me, but I would like to study the Jacobian resulting fromthe linearization. If somebody has an example, I would appreciate it.Tony ==== I fear that this is a FAQ but after a couple of hours unsuccessfullysearching, I dare to post the question in the forum (sorry when imissed an obvious FAQ entry).When I type some charachters into the Mathematica FrontEnd I only get emptyboxes instead of the typed characters. This effect came up when II already followed some bugfixes. I corrected the MaxForXListFontsline in the file Specific.tr. The wri fonts can be seen withxlsfonts furthermore the fontpath countains links to the Type1 andX directories. However, the problem still persists.Is there any instruction in the web which describes a solution for theproblem?Norbert ==== hido you have the NUM LOCK key activated? turn it off, otherwise the wonderful and soo stable :-)))) mathematica frontend for linux will not work properly...you can easily verify if it is this problem that bugs you if the ENTER key of the numpad does not work properly.gerald-- *************************************Gerald RothM@th Desktop Development************************************* ==== I am not sure what is your problem (which characters do you type?), butcheck if the NumLock key is ON. It should be OFF when you type in theFrontEnd, and upgrading your system has maybe changed the deafult settingsfor the NumLock key upon starting X Window System. Marko----- Original Message ----- ==== Dear Andrzej KozlowskiAt first, I am so grateful to your reply which helped me with some stuffs.Anyway, tracing the inputs, I found something strange to me.I can't understand it.Jungkyu ChoiSeoul, South-Korea.----- Original Message ----- ==== I am not sure xactly what you are asking for. However, it is easy to replicate with Mathematica your computation of the number of irreducible polynomials of the form:x^50 +x^m + x^n + x^k+ 1In[1]:=testQ[{m_, n_, k_}] := PlusIn[2]:=t = Flatten[Table[{m, n, k}, {m, 49}, {n, m - 1}, {k, n - 1}], 2];In[3]:=Timing[ans = Select[t, testQ]; ]Out[3]={75.39*Second, Null}In[4]:=Length[ans]Out[4]=1421Andrzej KozlowskiYokohama, Japanhttp://www.mimuw.edu.pl/~akoz/http:// platon.c.u-tokyo.ac.jp/andrzej/ ==== Is this what you mean:<