Pith Number

pith:Q2FDZUPR

pith:1997:Q2FDZUPRR5Y2TKIKGCL2UB77NY

not attested not anchored not stored refs pending

Hopf Term for a Two-Dimensional Electron Gas: Comment to Reply to Comment

G.E. Volovik

arxiv:cond-mat/9711076 v1 · 1997-11-10 · cond-mat.mes-hall

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q2FDZUPRR5Y2TKIKGCL2UB77NY}

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	2026-07-04T14:22:58.653413Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

868a3cd1f18f71a9a90a3097aa07ff6e2fe5ed5df3bd0e2876b51a69a980e48f

Aliases

arxiv: cond-mat/9711076 · arxiv_version: cond-mat/9711076v1 · doi: 10.48550/arxiv.cond-mat/9711076 · pith_short_12: Q2FDZUPRR5Y2 · pith_short_16: Q2FDZUPRR5Y2TKIK · pith_short_8: Q2FDZUPR

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/Q2FDZUPRR5Y2TKIKGCL2UB77NY \
  | 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: 868a3cd1f18f71a9a90a3097aa07ff6e2fe5ed5df3bd0e2876b51a69a980e48f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d199844fc33f40cb16a555e9f8366747595cf6054488ffb63924f0d00690b609",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "1997-11-10T07:46:04Z",
    "title_canon_sha256": "bd8edf83127555d823de570ee63753ded8b275a36516b58afe7f6eece35d340f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cond-mat/9711076",
    "kind": "arxiv",
    "version": 1
  }
}