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This PR addresses several safety issues and technical debts:

  1. Climate Loss (loss.rs): Replaced unwrap() in sort_by with total_cmp. This prevents panics if NaN values are present in the distributions being compared for Earth Mover's Distance.
  2. Game Theory (evolutionary.rs): Changed ReplicatorDynamics::simulate to return Result. Added a check for population extinction (sum near zero) to prevent division by zero / NaN propagation.
  3. Radar Gating (super_resolution.rs): Added validation in MusicEstimator::compute_spectrum to check for NaN eigenvalues before sorting. Added NumericalInstability error variant.
  4. Sorting (linear.rs): Replaced expect with unwrap_or(&0) in RadixSorter for cleaner, panic-free code (though it was guarded).

Tests were added and updated to verify these changes. cargo clippy and cargo fmt were run.


PR created automatically by Jules for task 7102040448943071072 started by @fderuiter

- Refactored `math_explorer/src/climate/loss.rs` to use `total_cmp` for safe NaN handling in EMD calculation.
- Refactored `math_explorer/src/applied/game_theory/evolutionary.rs` to return `Result` from simulation methods and handle population extinction.
- Refactored `math_explorer/src/physics/medical/radar_gating/super_resolution.rs` to check for NaNs in MUSIC estimator and use safe sorting.
- Refactored `math_explorer/src/applied/algorithms/sorting/linear.rs` to remove `expect`.
- Added `PopulationExtinction` to `GameTheoryError` and `NumericalInstability` to `RadarError`.
- Added tests for NaN handling.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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2 participants