Hi there,
J looks very interesting. I have no previous experience with array
languages and, being curious, started to experiment. Now, I would
like to solve a system of non-linear equations. I could only examples
solving single equations like this one:

## Advertising

N=: 1 : '- u % u d. 1' NB. Adverb implementing Newton-Raphson iteration.
(_2 + *:) N^:_ ]1 NB. Find root of “0 = _2+x^2”, starting guess of “1”.
Is it also possible to solve a system of equation like the following
one in a similar elegant manner?
f1(x) = a*(1-x1)
f2(x) = b*(x2-x1^2)
Example from https://www.gnu.org/software/gsl/doc/html/multiroots.html#examples
Thanks for any ideas!
-Martin
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