Andrii Siriak
Andrii Siriak
Please add a description of the problem
Not needed
You could check that data points withing the passband are relatively unchanged, while data points outside of it are relatively suppressed. For floating point values, it's sufficient to check that...
@geek101-cy please let me know what the problem is and how it can be solved
Please write in English
Please fix the PR check 
Isn't it always equal to the first element? If not, please provide a counterexample.
I probably don't understand the problem statement.
Let's wait for #4794
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