Kotlin/multik

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Multidimensional array library for Kotlin

Stars: 735
Forks: 51
Open beginner issues: 0
Indexed issues: 68
Avg merge: 9h 52m
Merged PRs (30d): 6

Dominant language: Kotlin
License: Apache-2.0
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 18, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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68 open issues indexed

Default/OpenBLAS matrix.transpose() dot vector yields NaNs and Zeroes compared to Kotlin implementation Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

Kotlin/multik#345 · Opened Aug 13, 2026
Unchecked casts in public initMemoryView API Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#328 · Opened Apr 21, 2026
Engine: fail-fast on missing engine, deduplicate lazy-init Open

refactor

Difficulty 3/5 1-2 days Newbie friendliness 52/100

Kotlin/multik#327 · Opened Apr 21, 2026
Missing tests for inplace math, assign operators, and shape ops Open

test

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Kotlin/multik#326 · Opened Apr 21, 2026
MathEx/LinAlgEx naming is non-idiomatic Open

api feature

Difficulty 5/5 Over a week Newbie friendliness 30/100

Kotlin/multik#325 · Opened Apr 21, 2026
NDArray constructor undermines MultiArray read-only contract Open

ai-generated api ndarray refactor

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#324 · Opened Apr 21, 2026
Reduce overload explosion in constructors.kt Open

refactor

Difficulty 5/5 Over a week Newbie friendliness 25/100

Kotlin/multik#323 · Opened Apr 21, 2026
Flaky: PLU decomposition ComplexDouble returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Kotlin/multik#289 · Opened Feb 28, 2026
Flaky: QR decomposition ComplexDouble returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#288 · Opened Feb 28, 2026
Flaky: NativeLinAlg.inv ComplexDouble returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#287 · Opened Feb 28, 2026
Flaky: NativeLinAlg.inv ComplexFloat returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#286 · Opened Feb 28, 2026
Flaky: NativeLinAlg.dot matrix-vector ComplexFloat returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Kotlin/multik#285 · Opened Feb 28, 2026
Flaky: NativeLinAlg.dot matrix-vector ComplexDouble returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#284 · Opened Feb 28, 2026
Flaky: NativeLinAlg.dot matrix-matrix ComplexFloat returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#283 · Opened Feb 28, 2026
Flaky: NativeLinAlg.dot matrix-matrix ComplexDouble returns wrong result on Linux Open

ai-generated bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#282 · Opened Feb 28, 2026
Scalar-on-left operators always `deepCopy`, ignoring `consistent` optimization Open

perf refactor

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Kotlin/multik#258 · Opened Feb 21, 2026
Inconsistent error handling Open

engine-kotlin ndarray refactor

Difficulty 4/5 3-5 days Newbie friendliness 20/100

Kotlin/multik#257 · Opened Feb 21, 2026
refactor linalg implementations in multik-kotlin Open

refactor

Difficulty 5/5 Over a week Newbie friendliness 25/100

Kotlin/multik#256 · 1 reaction · Opened Feb 21, 2026
Dimension-specific methods bloat the public API Open

api feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

Kotlin/multik#255 · Opened Feb 21, 2026
Eliminate unnecessary array copying in reshape and unsqueeze Open

ndarray perf

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#252 · Opened Feb 21, 2026
Investigate unchecked cast in NDArray.asType() Open

ndarray

Difficulty 3/5 1-2 days Newbie friendliness 42/100

Kotlin/multik#251 · Opened Feb 21, 2026
Implement equals and hashCode for ComplexFloat Open

api ndarray

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Kotlin/multik#250 · Opened Feb 21, 2026
Enable WASM and JS tests Open

bug ndarray platform:kmp platform:wasm

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#247 · 1 reaction · Opened Feb 21, 2026
Numerical instability for complex dot product with Im=0.0 in native implementation Open

bug engine-native linalg

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Kotlin/multik#222 · Opened Oct 31, 2025
Missing empty list check in array filter function Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

Kotlin/multik#221 · Opened Jul 30, 2025
.where for performing masked operations Open

api feature

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Kotlin/multik#220 · 2 comments · Opened May 9, 2025
Add a scalar Open

question

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Kotlin/multik#219 · 1 comment · 1 reaction · Opened May 9, 2025
Zero-sized ndarrays Open

api feature perf platform:kmp

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#217 · 6 comments · Opened Feb 6, 2025
Depending on the engine used linalg.qr returns full or reduced QR decomposition Open

bug engine-native platform:jvm

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Kotlin/multik#216 · Opened Jan 26, 2025
Some efficient method for permuting elements of an NDArray to get a new NDArray Open

api feature ndarray perf

Difficulty 5/5 Over a week Newbie friendliness 35/100

Kotlin/multik#215 · 1 comment · Opened Jan 1, 2025
build error: libmultik_jni-linuxX64.so is not an ABI even though I'm not building for that target Open

bug platform:android

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#214 · 5 comments · 3 reactions · Opened Dec 11, 2024
3 dimensional arrays don't do dot product of sub-matrices correctly Open

bug engine-native

Difficulty 3/5 1-2 days Newbie friendliness 42/100

Kotlin/multik#212 · 3 comments · Opened Nov 21, 2024
[wild idea] Compiler plugin to support any dimension Open

feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

Kotlin/multik#210 · 1 comment · 1 reaction · Opened Sep 30, 2024
multik in andriod14 ，the transpose funtion is too slow Open

bug perf wait for reply

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Kotlin/multik#204 · 2 comments · Opened Apr 21, 2024
combination of android sharedUserId and multik leading to crashes Open

api bug platform:android

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Kotlin/multik#203 · 3 comments · 1 reaction · Opened Mar 22, 2024
[native] linalg implementations deep copy input arrays Open

engine-native linalg perf refactor

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#202 · 2 comments · 1 reaction · Opened Mar 5, 2024
Modification of return types in math functions from Boolean Open

api feature refactor

Difficulty 5/5 Over a week Newbie friendliness 20/100

Kotlin/multik#190 · Opened Jan 25, 2024
bug with casting .toFloat on JS Open

bug platform:kmp

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Kotlin/multik#187 · 1 comment · Opened Jan 24, 2024
Type casting in multidimensional case (ND) throws an exception in wasm Open

bug platform:wasm

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Kotlin/multik#185 · Opened Jan 23, 2024
Add support for bulk setter using primitive array Open

api feature ndarray perf

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Kotlin/multik#179 · Opened Jan 9, 2024
Expose singularity error level to public api Open

api engine-native

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Kotlin/multik#178 · 1 comment · Opened Oct 30, 2023
Usage of unsupported type causes runtime error Open

api bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

Kotlin/multik#177 · 1 comment · Opened Oct 30, 2023
Hide non-public properties and functions Open

api refactor

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Kotlin/multik#173 · 1 comment · Opened Jul 27, 2023
support vector api like jdk21 Open

feature perf platform:jvm

Difficulty 5/5 Over a week Newbie friendliness 35/100

Kotlin/multik#163 · 3 comments · 2 reactions · Opened May 11, 2023
any plan to add `power` function like numpy? Open

api engine-native feature

Difficulty 5/5 Over a week Newbie friendliness 30/100

Kotlin/multik#162 · 5 comments · 2 reactions · Opened May 11, 2023
bug with reading csv with array of complex numbers from numpy Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Kotlin/multik#161 · Opened May 4, 2023
add parser for datatypes Open

feature ndarray platform:kmp

Difficulty 5/5 Over a week Newbie friendliness 15/100

Kotlin/multik#160 · Opened Apr 28, 2023
add multiplatform serialization for csv Open

feature ndarray platform:kmp

Difficulty 5/5 Over a week Newbie friendliness 20/100

Kotlin/multik#158 · Opened Apr 26, 2023
Comparison and getting boolean mask Open

api feature ndarray

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Kotlin/multik#150 · 1 reaction · Opened Nov 17, 2022
Add `pad` function Open

api feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

Kotlin/multik#149 · 1 comment · Opened Nov 14, 2022

Kotlin/multik

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