Pith Number

pith:42EIHXJM

pith:2016:42EIHXJMZQTHFDEVVCG2CLNZCK

not attested not anchored not stored refs pending

Two-phase anisotropic free boundary problems and applications to the Bellman equation in 2D

Daniela De Silva, Luis Caffarelli, Ovidiu Savin

arxiv:1604.04499 v1 · 2016-04-15 · 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{42EIHXJMZQTHFDEVVCG2CLNZCK}

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	2026-05-18T00:26:02.219073Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e68883dd2ccc26728c95a88da12db912a54a8acbf597a81af87615ce205f28d4

Aliases

arxiv: 1604.04499 · arxiv_version: 1604.04499v1 · doi: 10.48550/arxiv.1604.04499 · pith_short_12: 42EIHXJMZQTH · pith_short_16: 42EIHXJMZQTHFDEV · pith_short_8: 42EIHXJM

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/42EIHXJMZQTHFDEVVCG2CLNZCK \
  | 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: e68883dd2ccc26728c95a88da12db912a54a8acbf597a81af87615ce205f28d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3fc0cd88f9d3d4d41965ce47d0cc5d9f2e8842f567518dfd0a43e2fae3496db9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2016-04-15T13:45:59Z",
    "title_canon_sha256": "aa1f75bcf2242197d8cc15a10fc463048547a23a916c66c414a79cc0be628028"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.04499",
    "kind": "arxiv",
    "version": 1
  }
}