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add laplace_latent_solve and laplace_latent_solve_tol functions

Status: Open.

#3335 In stan-dev/math;

· avehtari opened on Jun 18, 2026

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

Status: Open.

#3329 In stan-dev/math;

· martonaronvarga opened on Jun 4, 2026

wiener_lpdf reverse-mode derivative wrt w disagrees with finite differences of Stan Math value

Status: Open.

#3322 In stan-dev/math;

· martonaronvarga opened on May 12, 2026

Redundant function multiply_log vs. lmultiply

Status: Open.

#3318 In stan-dev/math;

· jachymb opened on May 10, 2026

test multithreading on exp using TBB

Status: Open.

#3311 In stan-dev/math;

· drezap opened on Apr 23, 2026

Laplace tests taking too long in develop Jenkins runs

continuous integration

Status: Open.

#3309 In stan-dev/math;

· WardBrian opened on Apr 21, 2026

Continuous modified second kind Bessel function

Status: Open.

#3306 In stan-dev/math;

· currocam opened on Apr 20, 2026

reduce_sum_static: Missing ref_type_t Wrapper

bug

code cleanup

good first issue

Status: Open.

#3304 In stan-dev/math;

· andrepfeuffer opened on Apr 17, 2026

Feature request: permit location of 0/negative_infinity() in neg_binomial_2(_log)_lpmf

distributionsIssues that deal with distribution functions: pdf, pmf, cdfIssues that deal with distribution functions: pdf, pmf, cdf

good first issue

numericsNumerical issuesNumerical issues

Status: Open.

#3302 In stan-dev/math;

· mhollanders opened on Apr 13, 2026

Add low-rank multivariate normal distribution

Status: Open.

#3288 In stan-dev/math;

· lingium opened on Feb 24, 2026

Reuse direct reverse mode autodiff specializations for known laplace distributions

Status: Open.

#3287 In stan-dev/math;

· SteveBronder opened on Feb 23, 2026

Matrix comprehensions (build_matrix function)

feature

new function

Status: Open.

#3282 In stan-dev/math;

· WardBrian opened on Feb 12, 2026