Pith Number

pith:UT4OYPTQ

pith:2012:UT4OYPTQCEAOJJNWLEZGSS5NXR

not attested not anchored not stored refs pending

A Fully Coupled Immersed Finite Element Method for Fluid Structure Interaction via the Deal.II Library

Francesco Costanzo, Luca Heltai, Saswati Roy

arxiv:1209.2811 v1 · 2012-09-13 · math.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UT4OYPTQCEAOJJNWLEZGSS5NXR}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:45:40.902097Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4f8ec3e701100e4a5b65932694badbc52356f8b4afb7a1341b997aad459d3ca

Aliases

arxiv: 1209.2811 · arxiv_version: 1209.2811v1 · doi: 10.48550/arxiv.1209.2811 · pith_short_12: UT4OYPTQCEAO · pith_short_16: UT4OYPTQCEAOJJNW · pith_short_8: UT4OYPTQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UT4OYPTQCEAOJJNWLEZGSS5NXR \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a4f8ec3e701100e4a5b65932694badbc52356f8b4afb7a1341b997aad459d3ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f49d650b56b5de30c814ae688728ab3b8f16bcec6afa2f2d14db6683602346f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-09-13T08:27:31Z",
    "title_canon_sha256": "46731e51661ad4ba7627c204a8094a240187dc5fd0b375b21e9c503f3cb9c397"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.2811",
    "kind": "arxiv",
    "version": 1
  }
}