Steve Bronder

Cleanup varmat multi-index to use a hashmap instead of a set

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#### Submission Checklist - [x] Run unit tests: `./runTests.py src/test/unit` - [x] Run cpplint: `make cpplint` - [x] Declare copyright holder and open-source license: Steve Bronder #### Summary When we...

Example link crashes https://piotte13.github.io/SIMD-Visualiser/#/

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Page goes blank when clicking visualize

5.0 Release Branch

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## Description We want to merge #2995 and #2928 which are both backwards breaking changes #2995 removes the `_log()` lpdf functions, which the compiler already errors on when users try...

Add simplex row and column matrix constraints

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## Summary This adds the functions `simplex_row_constrain` and `simplex_column_constrain` to be used by the stan language for matrices with simplexes along the rows or columns of the matrix. This is...

Allow arena_matrix to use move semantics

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## Summary This PR does two things 1. Allows `arena_matrix` to use move semantics - If an `arena_matrix`' s constructor is passed an rvalue, instead of allocating memory onto the...

Add arena_matrix specialization for sparse matrices

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## Summary While working on a branch to let Stan math use ctest and cmake I found a memory leak in the sparse matrix impl for vari. It was a...

Allow cmake users to use FetchContent_Declare

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## Description It would be nice for cmake users to be able to use something like the following to include Stan math in their projects ``` include(FetchContent) FetchContent_Declare( stanmath GIT_REPOSITORY...

Allow OpenCL simplex to use softmax?

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## Description I'm in the process of writing out the deserializer for OpenCL so we can have models that run entirely on the GPU. We do not yet have a...

ad embedded expression tests to expect_ad testing framework

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## Summary This adds a simple version of the expression testing framework directly into the call to `expect_ad()`. This helps fix #2736 by making sure any function that goes through...

Cleanup accumulator?

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## Description It's an extra cost, but when we use [`accumulator.add(Vector)`](https://github.com/stan-dev/math/blob/develop/stan/math/prim/fun/accumulator.hpp#L52) method in a Stan model should the sum we do there use `log_sum_exp()` since we are summing a bunch...