Pith Number

pith:JVZJI6I6

pith:2012:JVZJI6I64MOD54TQZ72UKZWKTH

not attested not anchored not stored refs pending

Optimal Regularity for the parabolic No-Sign Obstacle Problem

Erik Lindgren, Henrik Shahgholian, John Andersson

arxiv:1210.2849 v1 · 2012-10-10 · 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{JVZJI6I64MOD54TQZ72UKZWKTH}

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	2026-05-18T03:43:31.382817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d7294791ee31c3ef270cff54566ca99c478a1f5b1d9c1eedebead8ac67c2dfd

Aliases

arxiv: 1210.2849 · arxiv_version: 1210.2849v1 · doi: 10.48550/arxiv.1210.2849 · pith_short_12: JVZJI6I64MOD · pith_short_16: JVZJI6I64MOD54TQ · pith_short_8: JVZJI6I6

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/JVZJI6I64MOD54TQZ72UKZWKTH \
  | 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: 4d7294791ee31c3ef270cff54566ca99c478a1f5b1d9c1eedebead8ac67c2dfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "059fd0b3aec6ec54a27d39876ca3387915da8515825188bd17363362d845c369",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2012-10-10T09:51:50Z",
    "title_canon_sha256": "746f751b054b86f41d3e2172d80ab4be7d7eeb4c8c6a45071f58edf0ddcd7adc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.2849",
    "kind": "arxiv",
    "version": 1
  }
}