Pith Number

pith:KZ5NQXPI

pith:2016:KZ5NQXPI7BG7G3H3PB2AZMHYHV

not attested not anchored not stored refs pending

The classical obstacle problem for nonlinear variational energies

Emanuele Spadaro, Francesco Geraci, Matteo Focardi

arxiv:1610.09827 v1 · 2016-10-31 · 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{KZ5NQXPI7BG7G3H3PB2AZMHYHV}

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	2026-05-18T01:00:47.118918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

567ad85de8f84df36cfb78740cb0f83d7a44fabd7f58773d6b5aa06469264e6a

Aliases

arxiv: 1610.09827 · arxiv_version: 1610.09827v1 · doi: 10.48550/arxiv.1610.09827 · pith_short_12: KZ5NQXPI7BG7 · pith_short_16: KZ5NQXPI7BG7G3H3 · pith_short_8: KZ5NQXPI

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/KZ5NQXPI7BG7G3H3PB2AZMHYHV \
  | 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: 567ad85de8f84df36cfb78740cb0f83d7a44fabd7f58773d6b5aa06469264e6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9194ac5b740b20ad7dd6b48796b88c18e3d5d82e635ad1deb36db0dd466ff3df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2016-10-31T08:48:39Z",
    "title_canon_sha256": "74726e3cb81cea03e0ecbb51e1b052449a096bd9a06e0644f120aac5456e452a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.09827",
    "kind": "arxiv",
    "version": 1
  }
}