Pith Number

pith:QBZOBG4N

pith:2017:QBZOBG4NLEBKIMXATDWCRF2TVO

not attested not anchored not stored refs pending

Free Boundary Regularity for Almost-Minimizers

Guy David, Max Engelstein, Tatiana Toro

arxiv:1702.06580 v2 · 2017-02-21 · 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{QBZOBG4NLEBKIMXATDWCRF2TVO}

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	2026-05-17T23:46:22.151362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8072e09b8d5902a432e098ec289753ab9e91665f2c83634fe287b6ec460a9e66

Aliases

arxiv: 1702.06580 · arxiv_version: 1702.06580v2 · doi: 10.48550/arxiv.1702.06580 · pith_short_12: QBZOBG4NLEBK · pith_short_16: QBZOBG4NLEBKIMXA · pith_short_8: QBZOBG4N

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/QBZOBG4NLEBKIMXATDWCRF2TVO \
  | 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: 8072e09b8d5902a432e098ec289753ab9e91665f2c83634fe287b6ec460a9e66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e542bda72242d2b701cbac25baa1acfcc39717cbfb8b324e8338e1df4df58f7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-02-21T21:04:22Z",
    "title_canon_sha256": "5129a003698be692e4ad658bc6602d2f23e71b7ca4e7c112eb1ca623990c6c2e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.06580",
    "kind": "arxiv",
    "version": 2
  }
}