Maxime Méloux

Store mention ID in JSON

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Hello! First of all, thanks for this great piece of software. I am doing some parsing of messages on a server where I need to be able to link mentions...

Add Trainer support for ReduceLROnPlateau

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# What does this PR do? This PR solves #16503 by adding support to pytorch's [ReduceLROnPlateau](https://pytorch.org/docs/stable/generated/torch.optim.lr_scheduler.ReduceLROnPlateau.html) to `Trainer`. It does so by adding a new `REDUCE_ON_PLATEAU` field to `SchedulerType` and...

Slowness of RSolve for third-order relations and above

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## Description Mathics hangs when using `RSolve` on a linear fourth-order recurrence relation with simple coefficients, which should be able to be handled in seconds. The CPU usage is high...