Pith Number

pith:7QQUT4OK

pith:2019:7QQUT4OKDTMXMJJTFFW6HAKRWA

not attested not anchored not stored refs pending

Inverse Problems of Determining Sources of the Fractional Partial Differential Equations

Masahiro Yamamoto, Yikan Liu, Zhiyuan Li

arxiv:1904.05501 v1 · 2019-04-11 · 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{7QQUT4OKDTMXMJJTFFW6HAKRWA}

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	2026-05-17T23:48:44.860139Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc2149f1ca1cd9762533296de38151b00ef9088a2eca3e38d0b2a08de09b26b1

Aliases

arxiv: 1904.05501 · arxiv_version: 1904.05501v1 · doi: 10.48550/arxiv.1904.05501 · pith_short_12: 7QQUT4OKDTMX · pith_short_16: 7QQUT4OKDTMXMJJT · pith_short_8: 7QQUT4OK

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/7QQUT4OKDTMXMJJTFFW6HAKRWA \
  | 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: fc2149f1ca1cd9762533296de38151b00ef9088a2eca3e38d0b2a08de09b26b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7c3b502db3b36d9a77cf50695ebf612e4a9f7f5f0a37fe1b558f00aee3f5b72",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-04-11T02:40:05Z",
    "title_canon_sha256": "95c7e82d4d57dc33381c4ceef48207e67f146dba39509744d9d160aaf6f317af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05501",
    "kind": "arxiv",
    "version": 1
  }
}