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2013-07-22 06:50:43 -0500 asked a question why can't sage solve the equation x^n == 2*x ?
sage: var('x n')
(x, n)
sage: solve(x^n==2*x,x)
[x == 1/2*x^n]

This is not what I expect.

Who can help?

Thanks.

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2012-11-27 04:48:57 -0500 asked a question mpir error on 64bit

Hallo, installing sage5.4 failed on a 64bit machine under linux debian lenny. Who can help me. I don't want to change my debiansystem.

Thank you.

Here ist the logfile:

Found package mpir-2.4.0.p6 in spkg/standard/mpir-2.4.0.p6.spkg

mpir-2.4.0.p6

Extracting package /hdb2/sage-5.4.1/spkg/standard/mpir-2.4.0.p6.spkg -rw-r--r-- 1 rau rau 3844522 25. Jul 16:46 /hdb2/sage-5.4.1/spkg/standard/mpir-2.4.0.p6.spkg Finished extraction


Host system: Linux localhost 2.6.26-2-amd64 #1 SMP Sun Mar 4 21:48:06 UTC 2012 x86_64 GNU/Linux


C compiler: gcc C compiler version: Using built-in specs. Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.3.2-1.1' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-cld --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.3.2 (Debian 4.3.2-1.1)


Applying patches to upstream sources... patching file acinclude.m4 patching file configure.in patching file yasm/Makefile.in patching file configure patching file gmp-h.in patching file mpn/alpha/addlsh1_n.asm patching file mpn/alpha/sublsh1_n.asm patching file mpn/ia64/add_n.asm patching file mpn/ia64/addlsh1_n.asm patching file mpn/ia64/and_n.asm patching file mpn/ia64/andn_n.asm patching file mpn/ia64/ior_n.asm patching file mpn/ia64/iorn_n.asm patching file mpn/ia64/lshift.asm patching file mpn/ia64/nand_n.asm patching file mpn/ia64/nior_n.asm patching file mpn/ia64/rsh1add_n.asm patching file mpn/ia64/rsh1sub_n.asm patching file mpn/ia64/rshift.asm patching file mpn/ia64/sub_n.asm patching file mpn/ia64/sublsh1_n.asm patching file mpn/ia64/xnor_n.asm patching file mpn/ia64/xor_n.asm patching file mpn/m68k/add_n.asm patching file mpn/m68k/mc68020/addmul_1.asm patching file mpn/m68k/mc68020/submul_1.asm patching file mpn/m68k/sub_n.asm patching file mpn/powerpc32/vmx/and_n.asm patching file mpn/powerpc32/vmx/andn_n.asm patching file mpn/powerpc32/vmx/ior_n.asm patching file mpn/powerpc32/vmx/iorn_n.asm patching file mpn/powerpc32/vmx/nand_n.asm patching file mpn/powerpc32/vmx/nior_n.asm patching file mpn/powerpc32/vmx/xnor_n.asm patching file mpn/powerpc32/vmx/xor_n.asm patching file mpn/x86/add_n.asm patching file mpn/x86/addmul_1.asm patching file mpn/x86/applenopic/addmul_1.asm patching file mpn/x86/applenopic/submul_1.asm patching file mpn/x86/core2/add_n.asm patching file mpn/x86/core2/sub_n.asm patching file mpn/x86/k6/add_n.asm patching file mpn/x86/k6/addmul_1.asm patching file mpn/x86/k6/mmx/and_n.asm patching file mpn/x86/k6/mmx/andn_n.asm patching file mpn/x86/k6/mmx/hamdist.asm patching file mpn/x86/k6/mmx/ior_n.asm patching file mpn/x86/k6/mmx/iorn_n.asm patching file mpn ...

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2012-07-25 08:19:15 -0500 asked a question how to solve: exp(x)+exp(1/2*x) == 2?
sage: assume(x,'real')
sage: solve(exp(x)+exp(-1/2*x) == 2,x)
[x == 2*log(1/2*sqrt(5) - 1/2), x == 0]

that ist ok!

how can i get here the solution x==0?

sage: solve(exp(x)+exp(1/2*x) == 2,x)
[e^x == -e^(1/2*x) + 2]

Thanks for help.

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2012-03-12 02:06:03 -0500 asked a question solve x*exp(x)==0 and x*exp(-x)==0
sage: solve(x*exp(x)==0,x)
[x == 0, e^x == 0]

but

sage: solve(x*exp(-x)==0,x)
[x == 0]

How can i avoid the e^x==0 in the solutionlist?

Thanks for help.

2012-03-06 22:30:06 -0500 asked a question How to remove \left( \right)

latex(2^(3*x)) gives 2^{3\, x} this is fine, but

latex(e^(3*x)) gives e^{\left(3\, x \right)}.

How can i change this behaviour?

Thanks for help

2011-10-18 08:07:48 -0500 asked a question Real Solution of x^3+8 == 0?

I do not understand the following:

sage: assume(x,'real')
sage: solve(x^3+8==0,x)
[]

Why does this equation have no solution? But -2 is a solution!

Thanks for help!

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2011-06-25 09:01:32 -0500 asked a question latex(2*2^(1/3))
sage: latex(2*2^(1/2))
2 \, \sqrt{2}

that is ok

but what ist that?

sage: latex(2*2^(1/3))

2 \, 2^{\left(\frac{1}{3}\right)}

How can I get the right result

2\cdot 2^{\left(\frac{1}{3}\right)}

or

2\, \sqrt[3]{2}

????

Thanks for help

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2010-10-02 23:24:29 -0500 asked a question exponential equation real solution

How can I solve the equation exp(2x)+exp(-2x)==2

to get only the real solution x==0 ?

Thanks for help.

2010-10-02 06:35:11 -0500 asked a question exponential equation

sage: solve(exp(-x)+exp(x) == 2,x) [x == 0] sage: solve(exp(-2x)+exp(2x) == 2,x) []

Can tell me anyone why the second equation has no solution?

2010-09-28 22:16:58 -0500 asked a question latex(-(x-1)/(x+1)) still broken

I can't understand, why this is still broken because since a few months this problem is reported.

sage: latex(-(x-1)/(x+1)) ---> $\frac{-x-1}{x+1}$

sage version 4.5