Pith Number

pith:GFH4CWWP

pith:1999:GFH4CWWPH63YU7OLZJQK32ZBIN

not attested not anchored not stored refs pending

A possible route to spontaneous reduction of the heat conductivity by a temperature gradient driven instability in electron-ion plasmas

Keiichi Umetsu, Makoto Hattori

arxiv:astro-ph/9911465 v1 · 1999-11-25 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GFH4CWWPH63YU7OLZJQK32ZBIN}

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	2026-07-04T16:11:56.397015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

314fc15acf3fb78a7dcbca60adeb21435f516cf7a3941cf80409e4439f810ec0

Aliases

arxiv: astro-ph/9911465 · arxiv_version: astro-ph/9911465v1 · doi: 10.48550/arxiv.astro-ph/9911465 · pith_short_12: GFH4CWWPH63Y · pith_short_16: GFH4CWWPH63YU7OL · pith_short_8: GFH4CWWP

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/GFH4CWWPH63YU7OLZJQK32ZBIN \
  | 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: 314fc15acf3fb78a7dcbca60adeb21435f516cf7a3941cf80409e4439f810ec0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff41d03e76167dbae85a462d6bd44f47337233349ac77f21422c9f26143602ec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-25T08:57:29Z",
    "title_canon_sha256": "29798fe1a43476aaa8c985d843d779ceb864022dfe3fc10cd92b5c43b706b7a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911465",
    "kind": "arxiv",
    "version": 1
  }
}