Pith Number

pith:KD2NT5EJ

pith:2018:KD2NT5EJBCJRGH2PQ7HQG2NFWE

not attested not anchored not stored refs pending

On the Cauchy problem for the wave equation with data on the boundary

M. N. Demchenko

arxiv:1810.12631 v1 · 2018-10-30 · 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{KD2NT5EJBCJRGH2PQ7HQG2NFWE}

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	2026-05-18T00:01:56.469813Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50f4d9f4890893131f4f87cf0369a5b1142c400d5a6443c7a01fd006f0b6a786

Aliases

arxiv: 1810.12631 · arxiv_version: 1810.12631v1 · doi: 10.48550/arxiv.1810.12631 · pith_short_12: KD2NT5EJBCJR · pith_short_16: KD2NT5EJBCJRGH2P · pith_short_8: KD2NT5EJ

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/KD2NT5EJBCJRGH2PQ7HQG2NFWE \
  | 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: 50f4d9f4890893131f4f87cf0369a5b1142c400d5a6443c7a01fd006f0b6a786

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e144dd64e630d1c268d89c8f6ddd965daa4cde558c64deba72b55a80c5869ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2018-10-30T10:22:26Z",
    "title_canon_sha256": "13ca911ed5b8ec8ba88422e86f0668ba3e7cfc9d8a83108ede9803c6b4658e88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.12631",
    "kind": "arxiv",
    "version": 1
  }
}