$y(n) = x(-n)$ , causal or not , memory or memory-less ?
it's a question in digital signal processing course .
My guess it's memory less , causal because $x(-n)$ is only the inverse of the function ?
Memoryless System A system is memoryless if the output y[n] at every value of n depends only on the input x[n] at the same value of n
Causality A system is causal it’s output is a function of only the current and previous samples