Pith Number

pith:PO3JOK5M

pith:2013:PO3JOK5M4JL5BO7OUQ664VRCJQ

not attested not anchored not stored refs pending

Verification of functional a posteriori error estimates for obstacle problem in 1D

Jan Valdman, Petr Harasim

arxiv:1301.5923 v3 · 2013-01-24 · 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{PO3JOK5M4JL5BO7OUQ664VRCJQ}

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	2026-05-18T01:00:20.848301Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bb6972bace257d0bbeea43dee56224c2b50d56a6f506e5cd01bdc58715c9254

Aliases

arxiv: 1301.5923 · arxiv_version: 1301.5923v3 · doi: 10.48550/arxiv.1301.5923 · pith_short_12: PO3JOK5M4JL5 · pith_short_16: PO3JOK5M4JL5BO7O · pith_short_8: PO3JOK5M

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/PO3JOK5M4JL5BO7OUQ664VRCJQ \
  | 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: 7bb6972bace257d0bbeea43dee56224c2b50d56a6f506e5cd01bdc58715c9254

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "97b0baea29e5f8bad5f80916617589c92b88fc82d53801a29cccbad136b79910",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-01-24T22:18:05Z",
    "title_canon_sha256": "6ddb13c5fe18ace63e6b8c93307f05cbd5f53300a0e8aeadfd4349dac4420a3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5923",
    "kind": "arxiv",
    "version": 3
  }
}