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# Argument selection
Every coefficient of the defining modified-Struve series is positive for nonnegative order and positive argument, and differentiation leaves strictly positive terms. There are no positive zeros or stationary points to use. The origin and just one explicit reference argument x=1 are retained for orders 0 and 1, the pair occurring in the integral of I0. The unit argument is a modest reference sample, not a mathematically distinguished argument or a physically fixed parameter.
## Limitations
No externally demanded positive argument has been established. The two x=1 rows remain reference examples only.
## Primary references
- https://dlmf.nist.gov/11.2.E2
- https://dlmf.nist.gov/10.43.E2
The certified argument definitions are in `selection.json`. Run `python generate.py` to verify; run `python checks.py T494` for the independent checks. Neither command writes. Earlier attachments describe historical grids and remain available for provenance.