A start is
]S =: {: p. _9 0 1
+----+
|3 _3|
+----+
]T =: {: p. _2 0 1
+----------------+
|1.41421 _1.41421|
+----------------+
[email protected] wrote:
> Given that:
>
> S =: ( x : x^2 = 9) what is S
>
> S is 3 -3
>
> This can easily be done in your head.
>
> How would one write J code that would do this?
>
> On a more complicated note, how could one write in J code
> that would do:
>
> S = ( x : (x^2)-2 = 0)
>
> In this case S is 2^0.5 and _2^0.5
>
> The general question is:
>
> How does one write J code to determine a set based on a
> system of one or more equations?
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