# 1234

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## latex 测试

At first, we sample in the ( is odd) equidistant points around :
[
f_k = f(x_k),: x_k = x^+kh,: k=-\frac{N-1}{2},\dots,\frac{N-1}{2}
]
where is some step.
Then we interpolate points by polynomial

(1)

Its coefficients are found as a solution of system of linear equations:

(2)

Here are references to existing equations: (1), (2).
Here is reference to non-existing equation (??).