Paper Citation Record · LEDGER

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation

As of 16 August 2026, this Paper Citation Record lists 42 of 42 outbound references and 0 inbound Pith citation observations for arXiv:2505.20399.

A citation records a reference. It does not transfer a finding from one paper to another.

pith.paper-citation-record.v1
2505.20399 v1

Coverage vector

measured 42 of 42 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-08-07T14:01:40.370066Z

measured 42 of 42 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-08-16T06:30:59.297886+00:00

measured 0 of 0 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: cited_works

Reference resolution

42 of 42 outbound references displayed

verified exact1
verified fuzzy24
unresolved17
parse uncertain0
malformed identifier0
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External citation measurements

No source-named external measurement is stored.

Outbound references

Observation a143d470-17bd-4053-8438-dcd0f1e52880 · outbound

This paper cites , " * write output.state after.block = add.period write newline.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation , " * write output.state after.block = add.period write newline

Reference 1

Resolution: unresolved; no resolver link, observed 2026-08-07T14:01:36.783844Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation 549323a5-00f7-454e-8cd9-74a567fbc7f3 · outbound

This paper cites write newline.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation write newline

Reference 2

Resolution: unresolved; no resolver link, observed 2026-08-07T14:01:36.870655Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation a6ceeb6a-2096-4933-81ac-930740f02314 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 3

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:47.467716Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 26151d0d-dbc5-4d09-8c0a-83d4aeed4969 · outbound

This paper cites M., 1997, SIAM Journal on Scientific Computing, 18, 1553.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation M., 1997, SIAM Journal on Scientific Computing, 18, 1553

Reference 4

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:47.343346Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation fcc466d3-8c6d-447a-8cc0-814759ef82e1 · outbound

This paper cites J., Vasil G.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation J., Vasil G

Reference 5

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:47.224258Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation bb1ba602-3c0e-4580-a646-8637b40a70aa · outbound

This paper cites Cambridge University Press.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Cambridge University Press

Reference 6

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:47.069321Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation be8a7f44-4ed3-4b45-9e7a-9ed7bea37ce2 · outbound

This paper cites M., 1985, Journal of Computational Physics, 59, 264.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation M., 1985, Journal of Computational Physics, 59, 264

Reference 7

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:46.916160Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 3cf5b335-22ef-43d0-91c2-fe3c0338816a · outbound

This paper cites R., 1984, Journal of Computational Physics, 54, 174.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation R., 1984, Journal of Computational Physics, 54, 174

Reference 8

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:46.747054Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 6879effe-304c-4ac5-b109-160a2cfa4fdd · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 9

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:46.564223Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation d86b5572-fc9c-4ea0-85ef-cd0d341efcc2 · outbound

This paper cites D., Schnitzer T., Wesenberg M., 2002, Journal of Computational Physics, 175, 645.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation D., Schnitzer T., Wesenberg M., 2002, Journal of Computational Physics, 175, 645

Reference 10

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:46.354696Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 8c8e2a60-13f9-45c0-8014-81195c2333f5 · outbound

This paper cites Y., Kravtsov A.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Y., Kravtsov A

Reference 11

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:46.191560Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation a7c217b3-00c9-4303-a9f3-b9bf9e48aa2d · outbound

This paper cites K., 1959, Matematicheskii Sbornik, 47, 271, english translation in: J.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation K., 1959, Matematicheskii Sbornik, 47, 271, english translation in: J

Reference 12

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:45.968840Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 90260f53-d474-4dda-a727-d301d9b2ad93 · outbound

This paper cites M., Sani R.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation M., Sani R

Reference 13

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:45.752666Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation de1c4734-f7ba-49a5-a0d8-d2c567625e06 · outbound

This paper cites P., 2018, , 480, L111.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation P., 2018, , 480, L111

Reference 14

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:45.577622Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 5ac0e2c4-ef70-42a0-a3ed-bd0963c2b95f · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 15

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:45.405143Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 0cf7eb34-6004-4fd2-a39a-ce2e54c72265 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 16

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:45.225995Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 062e11b1-e104-4526-aca8-ea81f825ca7c · outbound

This paper cites D., van Leer B., 1983, SIAM Review, 25, 35.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation D., van Leer B., 1983, SIAM Review, 25, 35

Reference 17

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:44.967606Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation fc20532f-56e1-419b-9b47-a95f209a36de · outbound

This paper cites A., Rosotti G.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation A., Rosotti G

Reference 18

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:44.779043Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation d358a448-b491-4579-840c-89464a1d17cf · outbound

This paper cites D., 2007, Computing in Science Engineering, 9, 90.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation D., 2007, Computing in Science Engineering, 9, 90

Reference 19

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:44.649724Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 16a6cd02-466c-4b7d-9411-d584414f2510 · outbound

This paper cites I., McKee C.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation I., McKee C

Reference 20

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:44.472652Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 56e4af11-6767-4589-9640-582f906c5f65 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 21

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:44.221089Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation e32d1629-8321-4589-956c-b6ffc4baee07 · outbound

This paper cites S., Leschziner M.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation S., Leschziner M

Reference 22

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:44.049932Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 83a8d308-7403-4c01-8f75-b1feb6f6c38e · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 23

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:43.868015Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 990b9c31-8dff-4804-b0d9-e51e8795b81a · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 24

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:43.746013Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation ff5934e5-65bf-4c80-8627-eea345057f4e · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 25

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:43.604884Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation a1a37c1a-aded-4bce-b542-3015dc59dea1 · outbound

This paper cites PySPH: a Python-based framework for smoothed particle hydrodynamics.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation PySPH: a Python-based framework for smoothed particle hydrodynamics

Reference 26

Resolution: verified exact; local_arxiv, observed 2026-08-07T14:01:40.559802Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation efa47179-6558-454e-9499-349d45352ac7 · outbound

This paper cites E., Kravtsov A.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation E., Kravtsov A

Reference 27

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:43.491609Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation b2d7d9be-b1b7-4249-bf83-2d880c82d993 · outbound

This paper cites L., 1981, Journal of Computational Physics, 43, 357.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation L., 1981, Journal of Computational Physics, 43, 357

Reference 28

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:43.322657Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation b54bc49d-2cf5-432f-a660-3003d54fd160 · outbound

This paper cites L., 1986, Annual Review of Fluid Mechanics, 18, 337.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation L., 1986, Annual Review of Fluid Mechanics, 18, 337

Reference 29

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:43.189496Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 9c3e6637-1356-4f02-baa2-53cbaea4c459 · outbound

This paper cites I., 1959, Similarity and Dimensional Methods in Mechanics.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation I., 1959, Similarity and Dimensional Methods in Mechanics

Reference 30

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:43.052834Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation eaac81de-8d2f-42ae-97b9-f1ad31de1207 · outbound

This paper cites A., 1978, Journal of Computational Physics, 27, 1.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation A., 1978, Journal of Computational Physics, 27, 1

Reference 31

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:42.885234Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation bee1db51-8a5f-467c-9fec-c68e020c47d3 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 32

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:42.715506Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 81a1670b-5edd-4816-8ac2-8723a0ec4b7e · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 33

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:42.492659Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 3c3c82f4-697e-4a58-ba3d-e74654f65d6b · outbound

This paper cites Springer.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Springer

Reference 34

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:42.289446Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation ea5fbd3d-1415-4c94-a382-95bbb1bccc4b · outbound

This paper cites F., Spruce M., Speares W., 1994, Shock Waves, 4, 25.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation F., Spruce M., Speares W., 1994, Shock Waves, 4, 25

Reference 35

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:42.130174Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation f4273f51-3560-4cfc-b72e-16eae622034f · outbound

This paper cites D., van Leer B., Roberts , W.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation D., van Leer B., Roberts , W

Reference 36

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:41.950568Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 84b22a42-a20f-4257-be46-2da52864b11b · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 37

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:41.754494Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation ba29a840-723b-4330-a8c9-2bb028c09f88 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 38

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:41.517249Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 3999b56b-02d1-4683-923e-8ed2c52e9824 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 39

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:41.362518Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 5ab98bb9-702e-4a3a-a8af-1af71b926984 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 40

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:41.160396Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 18fdc743-4d16-4f92-a3b3-ac747a598a43 · outbound

This paper cites an unresolved cited work.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation Unresolved cited work

Reference 41

Resolution: unresolved; raw_fallback, observed 2026-08-07T14:01:40.973034Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Observation 5e045729-0522-41b2-8714-6db1dbf33e65 · outbound

This paper cites The Open Astrophysics Bookshelf.

ULULA: An ultra-lightweight 2D hydrodynamics code for teaching and experimentation The Open Astrophysics Bookshelf

Reference 42

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T14:01:40.749784Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.

Pith citing papers

No inbound Pith citation observations are available.