Pith Number

pith:Y5QXLABQ

pith:2017:Y5QXLABQQAOI3TWK5HZHFCPG6Q

not attested not anchored not stored refs pending

Recovering an Unknown Source in a Fractional Diffusion Problem

William Rundell, Zhidong Zhang

arxiv:1708.08345 v1 · 2017-08-25 · math.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y5QXLABQQAOI3TWK5HZHFCPG6Q}

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	2026-05-17T23:49:22.725173Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c761758030801c8dcecae9f27289e6f42876a579cf809d33dcfda9307da56eb3

Aliases

arxiv: 1708.08345 · arxiv_version: 1708.08345v1 · doi: 10.48550/arxiv.1708.08345 · pith_short_12: Y5QXLABQQAOI · pith_short_16: Y5QXLABQQAOI3TWK · pith_short_8: Y5QXLABQ

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/Y5QXLABQQAOI3TWK5HZHFCPG6Q \
  | 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: c761758030801c8dcecae9f27289e6f42876a579cf809d33dcfda9307da56eb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0eed103626158286a217709fa3878eac11a289793851f5b3d7d0630aa4d9740e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-08-25T08:07:19Z",
    "title_canon_sha256": "ee8f8d37d5fd80d47fc3ea80b669bac6b2067c876e45e5c0779579e443c3961c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.08345",
    "kind": "arxiv",
    "version": 1
  }
}