Differences between revisions 1 and 6 (spanning 5 versions)
⇤ ← Revision 1 as of 2010-12-18 11:04:56 →
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Editor: Jrachit
Comment:
← Revision 6 as of 2010-12-18 12:28:53 → ⇥
Size: 802
Editor: Jrachit
Comment:
Deletions are marked like this. Additions are marked like this.
Line 30: Line 30:
z = C[2,3]
y = C[1,3] - C[1,2]*z
x = C[0,3] - C[0,2]*z - C[0,1]*y		 z = C[2,3]/C[2,2]
y = (C[1,3]-C[1,2]*z)/C[1,1]
x=(C[0,3]-C[0,2]*z-C[0,1]*y)/C[0,0]

  • Book

    Linear Algebra

    Author

    Gilbert Strang

    Edition

    		 

x,y,z=var('x,y,z')
A=matrix(QQ,[[2,3,1],[4,7,5],[0,-2,2]])
print A
print
b = vector([8,20,0])
C = A.augment(b.transpose())
print C
print
C.swap_rows(1,0)
print C
print
C.add_multiple_of_row(1, 0,-1/2)
#C.add_multiple_of_row(1, 2, -2)

print C
print

#C.add_multiple_of_row(0, 2, -3)
C.add_multiple_of_row(2, 1, -4)

print C
print
z = C[2,3]/C[2,2]
y = (C[1,3]-C[1,2]*z)/C[1,1]
x=(C[0,3]-C[0,2]*z-C[0,1]*y)/C[0,0]
print "x=",x,"y=",y,"z=",z

  • Solution by:

    • RACHIT JHA, STUDENT, IIT ROORKEE
    • AMIT TEWARI, STUDENT, IIT ROORKEE
    • ARNAB BASU, STUDENT, IIT ROORKEE
    • SHUBHAM MITTAL, STUDENT, IIT ROORKEE

Strang-1.3-12-U (last edited 2010-12-18 12:28:53 by Jrachit)