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MGARD Decompression with s parameter is incorrect #1848

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@NAThompson

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Describe the bug

When MGARD is compressed with a certain value of s for the Besov s-norm, it must be decompressed with the exact same value of s, or else the decompressed values are completely wrong.

To Reproduce

The ADIOS2 wrapper always uses the s-parameter to compress; see here.

However, it never uses the s-parameter to decompress, see here.

I regard this as very low-priority, since MGARD is considering storing s in the compressed stream; see here.

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area: externalExternal dependency issuebugtriage: lowThis issue is a nice-to-have if we can get to it but isn't holding anybody up.

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