Replace division by zero with +-inf #38911
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Nov 5, 2024
sagemathgh-38911: Replace division by zero with +-inf <!-- ^ Please provide a concise and informative title. --> <!-- ^ Don't put issue numbers in the title, do this in the PR description below. --> <!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method to calculate 1 + 2". --> <!-- v Describe your changes below in detail. --> <!-- v Why is this change required? What problem does it solve? --> <!-- v If this PR resolves an open issue, please link to it here. For example, "Fixes sagemath#12345". --> With some compilers you get ``` src/sage/rings/integer.cp311- win_amd64.pyd.p/src/sage/rings/integer.pyx.c(62495): error C2124: divide or mod by zero ``` This is fixed by using `float(+- inf)`. Extracted from sagemath#38872 ### 📝 Checklist <!-- Put an `x` in all the boxes that apply. --> - [ ] The title is concise and informative. - [ ] The description explains in detail what this PR is about. - [ ] I have linked a relevant issue or discussion. - [ ] I have created tests covering the changes. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies <!-- List all open PRs that this PR logically depends on. For example, --> <!-- - sagemath#12345: short description why this is a dependency --> <!-- - sagemath#34567: ... --> URL: sagemath#38911 Reported by: Tobias Diez Reviewer(s): Travis Scrimshaw
vbraun
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Nov 6, 2024
sagemathgh-38911: Replace division by zero with +-inf <!-- ^ Please provide a concise and informative title. --> <!-- ^ Don't put issue numbers in the title, do this in the PR description below. --> <!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method to calculate 1 + 2". --> <!-- v Describe your changes below in detail. --> <!-- v Why is this change required? What problem does it solve? --> <!-- v If this PR resolves an open issue, please link to it here. For example, "Fixes sagemath#12345". --> With some compilers you get ``` src/sage/rings/integer.cp311- win_amd64.pyd.p/src/sage/rings/integer.pyx.c(62495): error C2124: divide or mod by zero ``` This is fixed by using `float(+- inf)`. Extracted from sagemath#38872 ### 📝 Checklist <!-- Put an `x` in all the boxes that apply. --> - [ ] The title is concise and informative. - [ ] The description explains in detail what this PR is about. - [ ] I have linked a relevant issue or discussion. - [ ] I have created tests covering the changes. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies <!-- List all open PRs that this PR logically depends on. For example, --> <!-- - sagemath#12345: short description why this is a dependency --> <!-- - sagemath#34567: ... --> URL: sagemath#38911 Reported by: Tobias Diez Reviewer(s): Travis Scrimshaw
vbraun
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Nov 7, 2024
sagemathgh-38911: Replace division by zero with +-inf <!-- ^ Please provide a concise and informative title. --> <!-- ^ Don't put issue numbers in the title, do this in the PR description below. --> <!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method to calculate 1 + 2". --> <!-- v Describe your changes below in detail. --> <!-- v Why is this change required? What problem does it solve? --> <!-- v If this PR resolves an open issue, please link to it here. For example, "Fixes sagemath#12345". --> With some compilers you get ``` src/sage/rings/integer.cp311- win_amd64.pyd.p/src/sage/rings/integer.pyx.c(62495): error C2124: divide or mod by zero ``` This is fixed by using `float(+- inf)`. Extracted from sagemath#38872 ### 📝 Checklist <!-- Put an `x` in all the boxes that apply. --> - [ ] The title is concise and informative. - [ ] The description explains in detail what this PR is about. - [ ] I have linked a relevant issue or discussion. - [ ] I have created tests covering the changes. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies <!-- List all open PRs that this PR logically depends on. For example, --> <!-- - sagemath#12345: short description why this is a dependency --> <!-- - sagemath#34567: ... --> URL: sagemath#38911 Reported by: Tobias Diez Reviewer(s): Travis Scrimshaw
vbraun
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Nov 8, 2024
sagemathgh-38911: Replace division by zero with +-inf <!-- ^ Please provide a concise and informative title. --> <!-- ^ Don't put issue numbers in the title, do this in the PR description below. --> <!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method to calculate 1 + 2". --> <!-- v Describe your changes below in detail. --> <!-- v Why is this change required? What problem does it solve? --> <!-- v If this PR resolves an open issue, please link to it here. For example, "Fixes sagemath#12345". --> With some compilers you get ``` src/sage/rings/integer.cp311- win_amd64.pyd.p/src/sage/rings/integer.pyx.c(62495): error C2124: divide or mod by zero ``` This is fixed by using `float(+- inf)`. Extracted from sagemath#38872 ### 📝 Checklist <!-- Put an `x` in all the boxes that apply. --> - [ ] The title is concise and informative. - [ ] The description explains in detail what this PR is about. - [ ] I have linked a relevant issue or discussion. - [ ] I have created tests covering the changes. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies <!-- List all open PRs that this PR logically depends on. For example, --> <!-- - sagemath#12345: short description why this is a dependency --> <!-- - sagemath#34567: ... --> URL: sagemath#38911 Reported by: Tobias Diez Reviewer(s): Travis Scrimshaw
Contributor
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While performance doesn't matter here (overflow is expected to be extremely rare), you might want to consider using https://stackoverflow.com/a/79170593/5267751 instead . |
vbraun
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Nov 9, 2024
sagemathgh-38911: Replace division by zero with +-inf <!-- ^ Please provide a concise and informative title. --> <!-- ^ Don't put issue numbers in the title, do this in the PR description below. --> <!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method to calculate 1 + 2". --> <!-- v Describe your changes below in detail. --> <!-- v Why is this change required? What problem does it solve? --> <!-- v If this PR resolves an open issue, please link to it here. For example, "Fixes sagemath#12345". --> With some compilers you get ``` src/sage/rings/integer.cp311- win_amd64.pyd.p/src/sage/rings/integer.pyx.c(62495): error C2124: divide or mod by zero ``` This is fixed by using `float(+- inf)`. Extracted from sagemath#38872 ### 📝 Checklist <!-- Put an `x` in all the boxes that apply. --> - [ ] The title is concise and informative. - [ ] The description explains in detail what this PR is about. - [ ] I have linked a relevant issue or discussion. - [ ] I have created tests covering the changes. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies <!-- List all open PRs that this PR logically depends on. For example, --> <!-- - sagemath#12345: short description why this is a dependency --> <!-- - sagemath#34567: ... --> URL: sagemath#38911 Reported by: Tobias Diez Reviewer(s): Travis Scrimshaw
vbraun
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Nov 13, 2024
sagemathgh-38911: Replace division by zero with +-inf <!-- ^ Please provide a concise and informative title. --> <!-- ^ Don't put issue numbers in the title, do this in the PR description below. --> <!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method to calculate 1 + 2". --> <!-- v Describe your changes below in detail. --> <!-- v Why is this change required? What problem does it solve? --> <!-- v If this PR resolves an open issue, please link to it here. For example, "Fixes sagemath#12345". --> With some compilers you get ``` src/sage/rings/integer.cp311- win_amd64.pyd.p/src/sage/rings/integer.pyx.c(62495): error C2124: divide or mod by zero ``` This is fixed by using `float(+- inf)`. Extracted from sagemath#38872 ### 📝 Checklist <!-- Put an `x` in all the boxes that apply. --> - [ ] The title is concise and informative. - [ ] The description explains in detail what this PR is about. - [ ] I have linked a relevant issue or discussion. - [ ] I have created tests covering the changes. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies <!-- List all open PRs that this PR logically depends on. For example, --> <!-- - sagemath#12345: short description why this is a dependency --> <!-- - sagemath#34567: ... --> URL: sagemath#38911 Reported by: Tobias Diez Reviewer(s): Travis Scrimshaw
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With some compilers you get
This is fixed by using
float(+- inf).Extracted from #38872
📝 Checklist
⌛ Dependencies