Pith Number

pith:OMB7YGCL

pith:2015:OMB7YGCLAF4YAJGC7HEXFREAU6

not attested not anchored not stored refs pending

A free boundary problem arising in PDE optimization

Bozhidar Velichkov, Edouard Oudet, Giuseppe Buttazzo

arxiv:1506.00141 v1 · 2015-05-30 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OMB7YGCLAF4YAJGC7HEXFREAU6}

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	2026-05-18T01:59:55.369676Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7303fc184b01798024c2f9c972c480a7b3a0e0c06998f336a0a22ad1c1bc300d

Aliases

arxiv: 1506.00141 · arxiv_version: 1506.00141v1 · doi: 10.48550/arxiv.1506.00141 · pith_short_12: OMB7YGCLAF4Y · pith_short_16: OMB7YGCLAF4YAJGC · pith_short_8: OMB7YGCL

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/OMB7YGCLAF4YAJGC7HEXFREAU6 \
  | 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: 7303fc184b01798024c2f9c972c480a7b3a0e0c06998f336a0a22ad1c1bc300d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba3e9241f1da24969a731adcf3c2a84675dbe1a9ed27cb39946392a7ee25258e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-05-30T17:02:54Z",
    "title_canon_sha256": "c01501888dc906c26e928f0c5f1a099fac4c06081c2f0246f6adcf8c84aabe49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.00141",
    "kind": "arxiv",
    "version": 1
  }
}