[
https://issues.apache.org/jira/browse/MATH-1549?focusedWorklogId=461588&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-461588
]
ASF GitHub Bot logged work on MATH-1549:
----------------------------------------
Author: ASF GitHub Bot
Created on: 21/Jul/20 13:52
Start Date: 21/Jul/20 13:52
Worklog Time Spent: 10m
Work Description: asfgit merged pull request #155:
URL: https://github.com/apache/commons-math/pull/155
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
Issue Time Tracking
-------------------
Worklog Id: (was: 461588)
Time Spent: 1h (was: 50m)
> Simplex solver report unbounded solution when solvable constraints scaling up
> -----------------------------------------------------------------------------
>
> Key: MATH-1549
> URL: https://issues.apache.org/jira/browse/MATH-1549
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.6.1
> Environment: macOS catalina
> Reporter: Fan Zhang
> Priority: Major
> Attachments: CommonsMathSimplexSolverTest.java
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> *scenario 1:*
> {code:java}
> min: x + y
> x, y >= 0
> 9000x + y >= 0
> 10000x + y >= 2000
> x >= 2{code}
> *scenario 2:*
> {code:java}
> min: x + y
> x, y >= 0
> 9.0E15x + 1.0E12y >= 0
> 1.1e16x + 1.0e12y >= 2.0e15
> 1.0e12x >= 2e12{code}
> for scenario 1, it works out. but for scenario 2 whose constrains are just
> scaled up by 1e12, the solver reports unbounded solution.
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
