% 5.4; Jordan form, chain algorithm, railway cars
 % 5.5; matrix exponential, Putzer algorithm, fundamental solution
 % 5.6; vector-matrix variation of parameters, 3-tank brine cascade
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HW 11, due Week 12
 \BF{5.2}: \bx{8}, 11, 13, \bx{20}, 21, 27, 29, \bx{30}, 31, 35, 39, 43, 45, 49
 \BF{5.3} [5.4 in edition 5/E]: \bx{6}, 9, 13, 19, \bx{24}, 27
 \BF{5.4} [5.5 in edition 5/E]: 1, 7, \bx{11} , \bx{29}
 \BF{5.5} [5.6 in edition 5/E]: 1, 3, \bx{4}, 11, \bx{12},  23,  \bx{38}
 Edition 5/E problems are identical in matching sections:
   Edition 4/E          Edition 5/E
   5.1                  5.1
   5.2                  5.2
   5.3                  5.4 [a new 5.3 was inserted]
   5.4                  5.5
   5.5                  5.6
   5.6                  5.7
 We don't do the 5/E section 5.3 problems.
 The material in 5/E section 5.3 is a reference
 for Chapter 6 in both 4/E and 5/E.
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