Pith Number

pith:2KKTJNG2

pith:2013:2KKTJNG2BQUWWLYPUV42UFYEFS

not attested not anchored not stored refs pending

Pointwise regularity of the free boundary for the parabolic obstacle problem

Erik Lindgren, R\'egis Monneau

arxiv:1305.7349 v1 · 2013-05-31 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2KKTJNG2BQUWWLYPUV42UFYEFS}

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	2026-05-18T03:22:07.142505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d29534b4da0c296b2f0fa579aa17042cba71f29ef4ac729286a1bfbbb9607d40

Aliases

arxiv: 1305.7349 · arxiv_version: 1305.7349v1 · doi: 10.48550/arxiv.1305.7349 · pith_short_12: 2KKTJNG2BQUW · pith_short_16: 2KKTJNG2BQUWWLYP · pith_short_8: 2KKTJNG2

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/2KKTJNG2BQUWWLYPUV42UFYEFS \
  | 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: d29534b4da0c296b2f0fa579aa17042cba71f29ef4ac729286a1bfbbb9607d40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43287b2caec5b6eecd0150ef4a29b14454f2b4092d7715ed35ca1276c48f3241",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-05-31T10:39:52Z",
    "title_canon_sha256": "a0a6bbfae43ea76cfb1602237aeadc99ba97e238681f68ab06bbe28f4096e016"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.7349",
    "kind": "arxiv",
    "version": 1
  }
}