Pith Number

pith:7LXGFU4D

pith:2017:7LXGFU4DQ6W7XUYNXJP6GIZC7X

not attested not anchored not stored refs pending

Error identities for variational problems with obstacles

Jan Valdman, Sergey Repin

arxiv:1702.08689 v1 · 2017-02-28 · 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{7LXGFU4DQ6W7XUYNXJP6GIZC7X}

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	2026-05-18T00:49:48.108900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

faee62d38387adfbd30dba5fe32322fdd75dd4f64ff4d93a5374bd5255cd15fe

Aliases

arxiv: 1702.08689 · arxiv_version: 1702.08689v1 · doi: 10.48550/arxiv.1702.08689 · pith_short_12: 7LXGFU4DQ6W7 · pith_short_16: 7LXGFU4DQ6W7XUYN · pith_short_8: 7LXGFU4D

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/7LXGFU4DQ6W7XUYNXJP6GIZC7X \
  | 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: faee62d38387adfbd30dba5fe32322fdd75dd4f64ff4d93a5374bd5255cd15fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae3fd32787f987169184babd3d180c8631432dae8ddfa08babec7ba069b0f23c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-02-28T08:36:15Z",
    "title_canon_sha256": "dae16271c5f5f39cd8f824da8adc12ead9c962c2e0a45b0a7388d9833ee1530d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.08689",
    "kind": "arxiv",
    "version": 1
  }
}