Newbie question
- To: mathgroup at smc.vnet.net
- Subject: [mg18269] Newbie question
- From: Alexander Sirotkin <demiurg at math.tau.ac.il>
- Date: Thu, 24 Jun 1999 14:24:54 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Hi. Can anybody here explain what mathematica wants from me ? It's error messages (as always) does not contain any helpfull information and there is no way (as far as I know) to at least see where the error occured. Source file attached... thanks (*********************************************************************** Mathematica-Compatible Notebook This notebook can be used on any computer system with Mathematica 3.0, MathReader 3.0, or any compatible application. The data for the notebook starts with the line of stars above. To get the notebook into a Mathematica-compatible application, do one of the following: * Save the data starting with the line of stars above into a file with a name ending in .nb, then open the file inside the application; * Copy the data starting with the line of stars above to the clipboard, then use the Paste menu command inside the application. Data for notebooks contains only printable 7-bit ASCII and can be sent directly in email or through ftp in text mode. Newlines can be CR, LF or CRLF (Unix, Macintosh or MS-DOS style). NOTE: If you modify the data for this notebook not in a Mathematica- compatible application, you must delete the line below containing the word CacheID, otherwise Mathematica-compatible applications may try to use invalid cache data. For more information on notebooks and Mathematica-compatible applications, contact Wolfram Research: web: http://www.wolfram.com email: info at wolfram.com phone: +1-217-398-0700 (U.S.) Notebook reader applications are available free of charge from Wolfram Research. ***********************************************************************) (*CacheID: 232*) (*NotebookFileLineBreakTest NotebookFileLineBreakTest*) (*NotebookOptionsPosition[ 5158, 132]*) (*NotebookOutlinePosition[ 5794, 155]*) (* CellTagsIndexPosition[ 5750, 151]*) (*WindowFrame->Normal*) Notebook[{ Cell[CellGroupData[{ Cell[BoxData[{ \(diffEqM\ := \ \((\(M'\)[r]\ == \ 4*Pi*\((r^2)\)*\((rho[r])\)^2)\)\), \(diffEqP\ := \ \((\(P'\)[r]\ == \ \(-G\)*M[r]*rho[r]/r^2)\)\), \(diffEqT\ := \ \((\(T'\)[r]\ == \ \(-3\)*K[r]*L[r]*rho[r]/\((16*Pi*a*c*r^2*\((T[r])\)^3)\))\)\), \(diffEqL\ := \ \((\(L'\)[r]\ == \ 4*Pi*r^2*rho[r]*Eps[r])\)\n\), \(Eps[r_]\ \ := \ Eps\_0*rho[r]*\((T[r])\)^n\ \n\), \(K\_bf[r_]\ := \ \((4.34*10^25*g\_bf*\((1/t)\)*z*\((1 + x)\)*rho[r]/\((T[r])\)^\((1/2)\)) \)\), \(K\_ff[r_]\ := \ \((3.68*10^22*g\_ff*\((1 - z)\)*\((1 + x)\)*rho[r]/\((T[r])\)^\((7/2)\)) \)\), \(K\_es[r_]\ := \ \((0.2*\((1 + x)\))\)\), \(K[r_]\ := \ \((K\_bf[r]\ + \ K\_ff[r]\ + \ K\_es[r])\)\n\), \(P\_r\ := \ \((1/3)\)*a*\((T[r])\)^4\), \(P\_gas\ := \ \((k\_1*\((rho[r])\)^\((5/3)\))\)\), \(K\_1\ := \ \((3.23*10^12*\((1 + x)\)^\((5/3)\))\)\n\), \(x\ := \ 0.7\), \(y\ := \ 0.02\), \(z\ := \ 0.28\), \(g\_bf\ := \ \(g\_\(ff\ \) := \ \(t\ := \ 1\)\)\n\), \(diffEqs\ := \ {diffEqM, \ \ diffEqP, \ \ diffEqT, \ diffEqL, M[0]\ == \ 0, \ P[0]\ == \ P\_c, \ T[0]\ == \ T\_c, \ L[0] == 0}\), \(diffEqFuncs\ := \ {M, \ P, \ T, \ L}\n\), \(P\_c\ := \ 1\), \(T\_c\ := \ 1\n\), \(NDSolve[diffEqs, \ diffEqFuncs, \ {r, \ 0, \ 100}]\n\n\t\t\)}], "Input"], Cell[BoxData[ \(Compile::"cptype" \( : \ \) "\!\(Times\) not supported for type \!\(None\); evaluation will use the \ uncompiled function."\)], "Message"], Cell[BoxData[ \(Compile::"cptype" \( : \ \) "\!\(Times\) not supported for type \!\(None\); evaluation will use the \ uncompiled function."\)], "Message"], Cell[BoxData[ \(NDSolve::"ndnum" \( : \ \) "The right-hand side of the differential equation does not evaluate to \ a number at \!\(r\) == \!\(1.`\)."\)], "Message"], Cell[BoxData[ RowBox[{"NDSolve", "[", RowBox[{ RowBox[{"{", RowBox[{ RowBox[{ RowBox[{ SuperscriptBox["M", "\[Prime]", MultilineFunction->None], "[", "r", "]"}], "==", \(4\ \[Pi]\ r\^2\ rho[r]\^2\)}], ",", RowBox[{ RowBox[{ SuperscriptBox["P", "\[Prime]", MultilineFunction->None], "[", "r", "]"}], "==", \(-\(\(G\ M[r]\ rho[r]\)\/r\^2\)\)}], ",", RowBox[{ RowBox[{ SuperscriptBox["T", "\[Prime]", MultilineFunction->None], "[", "r", "]"}], "==", \(-\(\(3\ L[r]\ rho[r]\ \((\(0.340000000000000035`\[InvisibleSpace]\) + \(4.50431999999999987`*^22\ Null\ rho[r]\)\/T[r]\^\(7/2\) + \(2.06584000000000012`*^25\ Null\ rho[r]\)\/\ at T[r]) \)\)\/\(16\ a\ c\ \[Pi]\ r\^2\ T[r]\^3\)\)\)}], ",", RowBox[{ RowBox[{ SuperscriptBox["L", "\[Prime]", MultilineFunction->None], "[", "r", "]"}], "==", \(4\ \[Pi]\ r\^2\ rho[r]\^2\ Eps\_0\ T[r]\^n\)}], ",", \(M[1] == 0\), ",", \(P[1] == 1\), ",", \(T[1] == 1\), ",", \(L[1] == 0\)}], "}"}], ",", \({M, P, T, L}\), ",", \({r, 1, 100}\)}], "]"}]], "Output"] }, Open ]] }, FrontEndVersion->"X 3.0", ScreenRectangle->{{0, 1024}, {0, 768}}, WindowSize->{705, 596}, WindowMargins->{{117, Automatic}, {Automatic, 23}} ] (*********************************************************************** Cached data follows. 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