Pith Number

pith:3HZ7CPUQ

pith:2017:3HZ7CPUQQJPRVVEYGVQGEAWHJM

not attested not anchored not stored refs pending

Fully discrete finite element data assimilation method for the heat equation

Erik Burman, Jonathan Ish-Horowicz, Lauri Oksanen

arxiv:1707.06908 v1 · 2017-07-21 · 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{3HZ7CPUQQJPRVVEYGVQGEAWHJM}

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	2026-05-18T00:39:51.148026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d9f3f13e90825f1ad49835606202c74b146c1c92f946c03766364ffee041abc5

Aliases

arxiv: 1707.06908 · arxiv_version: 1707.06908v1 · doi: 10.48550/arxiv.1707.06908 · pith_short_12: 3HZ7CPUQQJPR · pith_short_16: 3HZ7CPUQQJPRVVEY · pith_short_8: 3HZ7CPUQ

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/3HZ7CPUQQJPRVVEYGVQGEAWHJM \
  | 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: d9f3f13e90825f1ad49835606202c74b146c1c92f946c03766364ffee041abc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf8a19f9e6861d1208606b5e0729053789cf79b17c683b32e2d0fbb09ea1fa73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-07-21T14:08:57Z",
    "title_canon_sha256": "4fba7ff2c6091b411f885985a7feb31e345b55d11bc140b57d3a9e1227064809"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.06908",
    "kind": "arxiv",
    "version": 1
  }
}