Pith Number

pith:72JQF34E

pith:2012:72JQF34ET54OQC4XH6UYKZXEKA

not attested not anchored not stored refs pending

Evidence for a direct band gap in the topological insulator Bi2Se3 from theory and experiment

B. B. Iversen, C. Friedrich, D. Guan, E. V. Chulkov, I. Aguilera, I. A. Nechaev, J. L. Mi, M. Bianchi, Ph. Hofmann, R. C. Hatch, S. Bl\"ugel

arxiv:1210.4477 v2 · 2012-10-16 · cond-mat.mtrl-sci

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{72JQF34ET54OQC4XH6UYKZXEKA}

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	2026-05-18T01:53:54.186138Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe9302ef849f78e80b973fa98566e450193acbe0042030ffe945d6f0019ebdd4

Aliases

arxiv: 1210.4477 · arxiv_version: 1210.4477v2 · doi: 10.48550/arxiv.1210.4477 · pith_short_12: 72JQF34ET54O · pith_short_16: 72JQF34ET54OQC4X · pith_short_8: 72JQF34E

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/72JQF34ET54OQC4XH6UYKZXEKA \
  | 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: fe9302ef849f78e80b973fa98566e450193acbe0042030ffe945d6f0019ebdd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25f8c3185cbc98fe73324915f2751b99dbcd5a395d3e022706083eebdf3ba6e0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2012-10-16T16:13:29Z",
    "title_canon_sha256": "561f41defad5413665b8aa24585d815500d99039183706fb77b0c9d0eb455baa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.4477",
    "kind": "arxiv",
    "version": 2
  }
}