MATLAB / Octave, 38 bytes

@(x)any(all([x;flip(x)]'==sort(x)',1))

#MATLAB / Octave, 38 bytes

@(x)any(all([x;flip(x)]'==sort(x)',1))

@(x)any(all([x;flip(x)]'==sort(x)',1))

added 43 characters in body

edited Jan 30, 2017 at 17:56

#MATLAB / Octave, 38 bytes

@(x)any(all([x;flip(x)]'==sort(x)',1))

#MATLAB / Octave, 38 bytes

@(x)any(all([x;flip(x)]'==sort(x)',1))

#MATLAB / Octave, 38 bytes

@(x)any(all([x;flip(x)]'==sort(x)',1))

answered Jan 30, 2017 at 17:51

#MATLAB / Octave, 38 bytes

@(x)any(all([x;flip(x)]'==sort(x)',1))

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