sympy/sympy
Mar 2025 – Jun 2026
4 Months active
Languages Used
Python
Technical Skills
Algorithm DesignCalculusSymbolic MathematicsCode RefactoringIntegrationSymbolic Computation
salastro
PROFILE
Salastro
Contributed to the sympy/sympy repository by enhancing symbolic integration routines, focusing on improving the handling of special functions such as erf, erfc, and erfi within integration by parts. Applied algorithm design and code refactoring skills in Python to refine LIATE heuristics, centralize rewrite rules, and expand test coverage for complex expressions involving exponentials, trigonometric, and logarithmic terms. Addressed stability issues in manual integration, particularly for challenging cases like ln(x)*exp(-x**2), by optimizing substitution paths and preventing recursion. Emphasized maintainability and performance through targeted integration testing, ensuring robust, reliable symbolic computation for advanced mathematical workflows.
Overall Statistics
Feature vs Bugs
77%Features
Repository Contributions
34Total
Bugs
3
Commits
34
Features
10
Lines of code
457
Activity Months4
Your Network
158 peopleShared Repositories
158
Work History
June 2026
2 Commits
Jun 1, 2026June 2026: Delivered a stability improvement for manual integration IBP in sympy/sympy, focusing on expressions with ln(x)*exp(-x**2), along with regression coverage to prevent IBP-induced recursion. The change fixes a faulty substitution path and yields a robust closed-form involving erf, boosting reliability for challenging integrals and reducing user debugging time.
2 Commits
Jun 1, 2026June 2026: Delivered a stability improvement for manual integration IBP in sympy/sympy, focusing on expressions with ln(x)*exp(-x**2), along with regression coverage to prevent IBP-induced recursion. The change fixes a faulty substitution path and yields a robust closed-form involving erf, boosting reliability for challenging integrals and reducing user debugging time.
June 2026
August 2025
29 Commits • 7 Features
Aug 1, 2025Month 2025-08 focused on strengthening the ManualIntegrate engine and its test coverage in sympy/sympy. Delivered extended support for erf/erfc/erfi in IBP heuristics, refined trig/complex exponential rules for more robust symbolic transformations, and expanded test suites to validate erf interactions with trig, hyperbolic, and logarithmic components. Implemented reliability and performance improvements by de-emphasizing expensive simplifications in complex exponential handling, and by x-failing known invalid tests to stabilize CI.
August 2025
29 Commits • 7 Features
Aug 1, 2025Month 2025-08 focused on strengthening the ManualIntegrate engine and its test coverage in sympy/sympy. Delivered extended support for erf/erfc/erfi in IBP heuristics, refined trig/complex exponential rules for more robust symbolic transformations, and expanded test suites to validate erf interactions with trig, hyperbolic, and logarithmic components. Implemented reliability and performance improvements by de-emphasizing expensive simplifications in complex exponential handling, and by x-failing known invalid tests to stabilize CI.
April 2025
2 Commits • 2 Features
Apr 1, 2025April 2025: Implemented and centralized PowSimp-based simplifications in the manual integration flow for sympy/sympy, improving handling of exponential expressions during integration and enabling easier management of rewrite rules. Refactored manualintegrate.py to move powsimp_rule into the alternatives node, centralizing rewrite rules for better switching, reuse, and lookup within the integration table, with conditional application for Mul and Pow subclasses. Demonstrated progress in maintainability, clarity, and future extensibility with no adverse regressions documented in this period.
2 Commits • 2 Features
Apr 1, 2025April 2025: Implemented and centralized PowSimp-based simplifications in the manual integration flow for sympy/sympy, improving handling of exponential expressions during integration and enabling easier management of rewrite rules. Refactored manualintegrate.py to move powsimp_rule into the alternatives node, centralizing rewrite rules for better switching, reuse, and lookup within the integration table, with conditional application for Mul and Pow subclasses. Demonstrated progress in maintainability, clarity, and future extensibility with no adverse regressions documented in this period.
April 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025: Focused on enhancing symbolic integration capabilities in the sympy/sympy repository. Implemented a precise adjustment to the LIATE rule to correctly prioritize erf(x) in integration by parts, improving accuracy and efficiency for expressions involving erf(x). This change reduces manual intervention and enhances the robustness of automatic integrals. Included the commit reference to the change: de4fd6eaaf988f55216f8eb08d619f1d8d85358b with message 'manualintegrate: Add erf to LIATE rule in integration by parts'.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025: Focused on enhancing symbolic integration capabilities in the sympy/sympy repository. Implemented a precise adjustment to the LIATE rule to correctly prioritize erf(x) in integration by parts, improving accuracy and efficiency for expressions involving erf(x). This change reduces manual intervention and enhances the robustness of automatic integrals. Included the commit reference to the change: de4fd6eaaf988f55216f8eb08d619f1d8d85358b with message 'manualintegrate: Add erf to LIATE rule in integration by parts'.
Activity
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Quality Metrics
Correctness89.4%
Maintainability89.4%
Architecture85.2%
Performance77.2%
AI Usage22.4%
Skills & Technologies
Programming Languages
Python
Technical Skills
Algorithm DesignAlgorithm OptimizationCalculusCode RefactoringDifferential EquationsIntegrationIntegration HeuristicsIntegration TestingMathematical OptimizationMathematicsPerformance OptimizationPythonPython programmingScientific ComputingSoftware Development
Repositories Contributed To
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