Pith Number

pith:3SXYGHMW

pith:2019:3SXYGHMWSPKCDRH7AMDUQ3TTAN

not attested not anchored not stored refs pending

Fundamental solution for Cauchy initial value problem for parabolic PDEs with discontinuous unbounded first-order coefficient at the origin. Extension of the classical parametrix method

Eugeny Ostrovsky, Leonid Sirota, Maria Rosaria Formica

arxiv:1906.05880 v1 · 2019-06-13 · 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{3SXYGHMWSPKCDRH7AMDUQ3TTAN}

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	2026-05-17T23:43:24.161268Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dcaf831d9693d421c4ff0307486e73036d2db6399a285ba859226cf129ca5072

Aliases

arxiv: 1906.05880 · arxiv_version: 1906.05880v1 · doi: 10.48550/arxiv.1906.05880 · pith_short_12: 3SXYGHMWSPKC · pith_short_16: 3SXYGHMWSPKCDRH7 · pith_short_8: 3SXYGHMW

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/3SXYGHMWSPKCDRH7AMDUQ3TTAN \
  | 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: dcaf831d9693d421c4ff0307486e73036d2db6399a285ba859226cf129ca5072

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20280e4fb3eeed08d6d34c5fa4fe1900027f5034c1e6c7042fb19ffecfcb0de0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-06-13T18:16:03Z",
    "title_canon_sha256": "b20b1a13fb7fac8d8c4ecc75a253aea764d6041c48bc09e494a620f2504d274e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.05880",
    "kind": "arxiv",
    "version": 1
  }
}