Issues

Issues

• log_modified_bessel_first_kind has zero derivatives in the order at v = 0 and v = 1

  stan-dev/math#3510 · opened on Nov 8, 2026

• cholesky_corr_free rejects cholesky_factor_corr draws read back from CmdStan CSV with the default sig_figs

  stan-dev/math#3486 · opened on Oct 26, 2026

• Complex dot_product and multiply(row_vector, vector) conjugate the first argument; columns_dot_product and rows_dot_product do not

  stan-dev/math#3483 · opened on Oct 23, 2026

• wiener_lpdf: faster term counts in the 4-parameter density and less repeated work in the 5-parameter gradients

  stan-dev/math#3481 · opened on Oct 23, 2026

• eigendecompose_sym, eigenvalues_sym and eigenvectors_sym do not compile for complex matrices of fvar<var> or fvar<fvar<double>>

  stan-dev/math#3477 · opened on Oct 22, 2026
  5

• Suggestion: Have the CI warn about or remove unused includes.

  stan-dev/math#3474 · opened on Oct 20, 2026
  1

• Embedded Laplace: when the first Newton step is rejected, the log density at the initial guess is returned as the log marginal (wrong by a lot)

  stan-dev/math#3469 · opened on Oct 18, 2026

• integrate_1d_adjoint repeats the whole quadrature once per differentiable argument

  stan-dev/math#3444 · opened on Oct 11, 2026

• Embedded Laplace, solver 3: the Newton iteration converges to saddle points and converges slowly

  stan-dev/math#3439 · opened on Oct 9, 2026

• SUGGESTION: Run the OpenCL tests under Oclgrind in CI to catch data races and invalid memory accesses in kernels

  Bug

  stan-dev/math#3430 · opened on Oct 4, 2026

• macOS default tbbmalloc_proxy can crash embedding hosts during foreign-pointer ownership checks

  Bug

  stan-dev/math#3425 · opened on Sep 30, 2026
  1

• All make_partials_propagator to return its input args as a tuple

  Feature

  stan-dev/math#3423 · opened on Sep 29, 2026
  4

• Use Eigen::BlockSparseMatrix in Embedded Laplace approximation internals

  stan-dev/math#3422 · opened on Sep 28, 2026

• Add check_foreach(...) function that does multiple checks at once on an array or matrix

  Feature

  stan-dev/math#3417 · opened on Sep 25, 2026
  1

• Inconsistent arena_matrix/varmat interaction between = and +=

  stan-dev/math#3407 · opened on Sep 19, 2026
  2

• Add Luupanov/Sylvester solver

  Feature

  stan-dev/math#3396 · opened on Sep 9, 2026
  1

• gaussian_dlm_obs_lpdf returns NaN instead of rejecting when the innovation variance collapses after time zero

  stan-dev/math#3381 · opened on Aug 31, 2026

• lccdf of beta overflows at reasonably normal values

  stan-dev/math#3377 · opened on Aug 28, 2026
  5

• Add doubly stochastic matrix constraint

  Feature

  stan-dev/math#3372 · opened on Aug 24, 2026
  1

• add functionality to interpolate in look-up tables

  stan-dev/math#3365 · opened on Aug 21, 2026
  13

• Derive log CDF and log CCDF of transformed distributions from std_log_lcdf

  stan-dev/math#3364 · opened on Aug 21, 2026
  2

• Add ITP one dimensional solver

  Feature

  stan-dev/math#3362 · opened on Aug 21, 2026
  5

• Feature request: row_centred_matrix and column_centred_matrix

  stan-dev/math#3361 · opened on Aug 18, 2026
  3

• Scans and reduction functions

  stan-dev/math#3340 · opened on Jun 30, 2026
  1

• wiener_lpdf full model returns -inf for valid-support inputs in variability branches

  stan-dev/math#3329 · opened on Jun 4, 2026
  5