Pith Number

pith:O4FXAJBD

pith:2019:O4FXAJBDCFUDPZ4BUHEOIOP74O

not attested not anchored not stored refs pending

Almost everywhere uniqueness of blow-up limits for the lower dimensional obstacle problem

Bozhidar Velichkov, Luca Spolaor, Maria Colombo

arxiv:1908.01413 v2 · 2019-08-04 · 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{O4FXAJBDCFUDPZ4BUHEOIOP74O}

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	2026-07-04T23:52:37.230304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

770b702423116837e781a1c8e439ffe3a792b5bbaa88647096dc093714ac21f7

Aliases

arxiv: 1908.01413 · arxiv_version: 1908.01413v2 · doi: 10.48550/arxiv.1908.01413 · pith_short_12: O4FXAJBDCFUD · pith_short_16: O4FXAJBDCFUDPZ4B · pith_short_8: O4FXAJBD

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/O4FXAJBDCFUDPZ4BUHEOIOP74O \
  | 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: 770b702423116837e781a1c8e439ffe3a792b5bbaa88647096dc093714ac21f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd3e062d794d9b1297521a6745e73824bb9c14855df59ce00827031fa5629b9e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-08-04T22:15:47Z",
    "title_canon_sha256": "0cecc071d46a35b3b150a615092aa8c525d8eebd2dc16fe48e10e18518d782d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01413",
    "kind": "arxiv",
    "version": 2
  }
}