Pith Number

pith:XUK3X4JT

pith:2015:XUK3X4JTMEZBO7AKD6I24MMOKH

not attested not anchored not stored refs pending

Double obstacle phase field approach to an inverse problem for a discontinuous diffusion coefficient

Charles M. Elliott, Klaus Deckelnick, Vanessa Styles

arxiv:1504.01935 v2 · 2015-04-08 · 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{XUK3X4JTMEZBO7AKD6I24MMOKH}

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	2026-05-18T01:16:50.913724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd15bbf1336132177c0a1f91ae318e51feec0f94d30b3127693ab7ad0cdb2456

Aliases

arxiv: 1504.01935 · arxiv_version: 1504.01935v2 · doi: 10.48550/arxiv.1504.01935 · pith_short_12: XUK3X4JTMEZB · pith_short_16: XUK3X4JTMEZBO7AK · pith_short_8: XUK3X4JT

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/XUK3X4JTMEZBO7AKD6I24MMOKH \
  | 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: bd15bbf1336132177c0a1f91ae318e51feec0f94d30b3127693ab7ad0cdb2456

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb9d9eea7cca6e84d878816389a474f57ade1b7e984e34740e17c3fea071f928",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-04-08T12:30:16Z",
    "title_canon_sha256": "3927a19e5cd8f6d9e892bf6fb76039899833fd7bb50e614d92adc54e28e02566"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.01935",
    "kind": "arxiv",
    "version": 2
  }
}