Vaibhav Singh

Fix constant TransferFunction rewrite to StateSpace (zero-state case)

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#### References to other Issues or PRs See also #26827 (this PR fixes the constant-transfer-function edge case in the TF → StateSpace conversion, related to that discussion but does not...

Add tests for TransferFunction.dc_gain

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NO ENTRY Add dc_gain unit tests to test_lti.py This commit adds missing tests for TransferFunction.dc_gain() to the existing test_lti.py file. Covered cases: - constant numerator / polynomial denominator - polynomial...

Add tests for TransferFunction.dc_gain

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### Summary This PR adds missing unit tests for `TransferFunction.dc_gain()` in the `sympy.physics.control` module. ### Tests added - constant numerator / polynomial denominator - polynomial numerator / polynomial denominator -...

[physics.control] Add missing tests for TransferFunction.step_response

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#### References to other Issues or PRs #### Brief description of what is fixed or changed This PR adds missing unit tests for `TransferFunction.step_response()` **and** fixes output-normalization issues in the...

Fixes #186 (follow-up proposal) This PR adds a discussion document in docs/unified-contributing-proposal.md that outlines ideas for improving consistency across contribution workflows in AboutCode projects. This is not a policy document....

Fixes #186 This PR adds a first draft of a unified CONTRIBUTING.md. The goal is to provide a simple and friendly starting point that reflects the common contribution practices already...