It shows:
shhu-ee-tau ~: ldd ~/Documents/SageMath/local/lib/libsdp.so.0
linux-vdso.so.1 => (0x00007ffdeb3b0000)
liblapack.so.3 =>
/home/shhu/Documents/SageMath/local/lib/liblapack.so.3 (0x00007fea93a69000)
libcblas.so.3 => /home/shhu/Documents/SageMath/local/lib/libcblas.so.3
(0x00007fea93846000)
libf77blas.so.3 =>
/home/shhu/Documents/SageMath/local/lib/libf77blas.so.3 (0x00007fea93624000)
libatlas.so.3 => /home/shhu/Documents/SageMath/local/lib/libatlas.so.3
(0x00007fea92ff3000)
libgfortran.so.3 =>
/home/shhu/Documents/SageMath/local/lib/libgfortran.so.3
(0x00007fea92cd6000)
libquadmath.so.0 =>
/home/shhu/Documents/SageMath/local/lib/libquadmath.so.0
(0x00007fea92a98000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fea92776000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fea923b1000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007fea92192000)
libgcc_s.so.1 => /home/shhu/Documents/SageMath/local/lib/libgcc_s.so.1
(0x00007fea91f7c000)
/lib64/ld-linux-x86-64.so.2 (0x000055d4b1ff6000)
在 2016年5月12日星期四 UTC+3上午11:11:05，Dima Pasechnik写道：
>
> and what does 'ldd /home/shhu/Documents/SageMath/local/lib/libsdp.so.0'
> say?
>
> On Wednesday, May 11, 2016 at 2:43:04 PM UTC+1, Dima Pasechnik wrote:
>>
>> It does work on some graphs, still, right?
>> It's a high-end relatively new CPU, perhaps Atlas and/or gcc has a
>> problem with it?
>>
>> Can you post the output of 'ldd theta', i.e.
>>
>> (sage-sh) dimpase@clpc171:sage$ ldd `which theta`
>> linux-vdso.so.1 (0x00007ffd2c34f000)
>> libsdp.so.0 => /home/scratch/dimpase/sage/sage/local/lib/libsdp.so.0
>> (0x00007f74f6ec3000)
>> liblapack.so.3 =>
>> /home/scratch/dimpase/sage/sage/local/lib/liblapack.so.3
>> (0x00007f74f65fc000)
>> libcblas.so.3 => /home/scratch/dimpase/sage/sage/local/lib/libcblas.so.3
>> (0x00007f74f63da000)
>> libf77blas.so.3 =>
>> /home/scratch/dimpase/sage/sage/local/lib/libf77blas.so.3
>> (0x00007f74f61b8000)
>> libatlas.so.3 => /home/scratch/dimpase/sage/sage/local/lib/libatlas.so.3
>> (0x00007f74f5b2a000)
>> libgfortran.so.3 => /lib64/libgfortran.so.3 (0x00007f74f57ca000)
>> libquadmath.so.0 => /lib64/libquadmath.so.0 (0x00007f74f558b000)
>> libm.so.6 => /lib64/libm.so.6 (0x00007f74f5288000)
>> libc.so.6 => /lib64/libc.so.6 (0x00007f74f4ec7000)
>> libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f74f4caa000)
>> libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f74f4a92000)
>> /lib64/ld-linux-x86-64.so.2 (0x000055f7fadea000)
>>
>> as well as the CSDP installation log:
>>
>> SAGE_ROOT/logs/pkgs/csdp-6.2.log
>>
>> On Wednesday, May 11, 2016 at 12:58:43 PM UTC+1, Sihuang Hu wrote:
>>>
>>> I just did what you suggested, and it didn't work. I got those messages:
>>>
>>> (sage-sh) shhu@shhu-ee-tau:~$ theta 2k2
>>> Segmentation fault (core dumped)
>>>
>>> My Cpu information is attached.
>>> Ubuntu 14.04LTS
>>> SageMath Version 7.0, Release Date: 2016-01-19
>>>
>>>
>>> 在 2016年5月10日星期二 UTC+3下午11:55:55，Dima Pasechnik写道：
>>>>
>>>> here is the input for theta executable:
>>>>
>>>> 4
>>>> 2
>>>> 1 2
>>>> 3 4
>>>>
>>>> (also attached)
>>>> save it to a file named, say, 2k2, fire up "sage -sh"
>>>> and run
>>>>
>>>> theta 2k2
>>>>
>>>> I get
>>>>
>>>> $ theta 2k2
>>>> Graph is of size 4 2
>>>> C block 1, blocksize, 4
>>>> Checking constraint 1
>>>> Checking constraint 2
>>>> Checking constraint 3
>>>> Iter: 0 Ap: 0.00e+00 Pobj: 1.0666667e+02 Ad: 0.00e+00 Dobj:
>>>> 0.0000000e+00
>>>> [... edited]
>>>> Iter: 15 Ap: 1.00e+00 Pobj: 2.0000000e+00 Ad: 9.00e-01 Dobj:
>>>> 2.0000000e+00
>>>> Success: SDP solved
>>>> Primal objective value: 2.0000000e+00
>>>> Dual objective value: 2.0000000e+00
>>>> Relative primal infeasibility: 1.11e-16
>>>> Relative dual infeasibility: 2.12e-10
>>>> Real Relative Gap: 8.56e-10
>>>> XZ Relative Gap: 9.63e-10
>>>> DIMACS error measures: 1.11e-16 0.00e+00 5.30e-10 0.00e+00 8.56e-10
>>>> 9.63e-10
>>>> The Lovasz Theta Number is 2.0000000e+00
>>>>
>>>> Does this work for you?
>>>>
>>>>
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