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sjhuan9999

½ð³æ (ÕýʽдÊÖ)

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0       P/2         0           0
P/2      0         S/2      Q/2
0       S/2          0           0
0      Q/2          0           0
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hank612

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

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sjhuan9999: ½ð±Ò+20, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, thanks 2015-09-17 09:16:20
Äã×Ô¼º×ö¹éÒ»»¯. Éèa^2=P^2+S^2+Q^2



Ôò ÌØÕ÷ʸ=(P,a,S,Q)^T ¶ÔÓ¦ ÌØÕ÷Öµ a;
ÌØÕ÷ʸ=(P,-a,S,Q)^T ¶ÔÓ¦ ÌØÕ÷Öµ -a;

ÌØÕ÷Öµ0 ¶ÔÓ¦ÓÚ (x,0,y,z), Âú×ã: P*x + S*y +Q*z=0
Òò´Ë¿ÉÒÔÈ¡(0,0,-Q,S)^T, (-Q^2-S^2, 0, PS, PQ)^T.
We_must_know. We_will_know.
2Â¥2015-09-17 07:40:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

sjhuan9999

½ð³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by hank612 at 2015-09-17 07:40:17
Äã×Ô¼º×ö¹éÒ»»¯. Éèa^2=P^2+S^2+Q^2

a=\sqrt{P^2+S^2+Q^2}

Ôò ÌØÕ÷ʸ=(P,a,S,Q)^T ¶ÔÓ¦ ÌØÕ÷Öµ a;
ÌØÕ÷ʸ=(P,-a,S,Q)^T ¶ÔÓ¦ ÌØÕ÷Öµ -a;

ÌØÕ÷Öµ0 ¶ÔÓ¦ÓÚ (x,0,y,z), Âú×ã: P*x + S*y +Q*z=0
Òò´Ë¿ÉÒÔÈ¡( ...

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3Â¥2015-09-17 09:57:48
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