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T2688.hs:8:22: error:
• Couldn't match expected type ‘v’ with actual type ‘s’
‘s’ is a rigid type variable bound by
the class declaration for ‘VectorSpace’
at T2688.hs:5:21
‘v’ is a rigid type variable bound by
the class declaration for ‘VectorSpace’
at T2688.hs:5:19
• In the second argument of ‘(/)’, namely ‘s’
In the second argument of ‘(*^)’, namely ‘(1 / s)’
In the expression: v *^ (1 / s)
• Relevant bindings include
s :: s (bound at T2688.hs:8:10)
v :: v (bound at T2688.hs:8:5)
(^/) :: v -> s -> v (bound at T2688.hs:8:5)
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