Pith Number

pith:2CO4PUM4

pith:2008:2CO4PUM4Q7VBNWVRXC4VDGZTBM

not attested not anchored not stored refs pending

Electric displacement as the fundamental variable in electronic-structure calculations

David Vanderbilt, Massimiliano Stengel, Nicola A. Spaldin

arxiv:0806.0844 v2 · 2008-06-04 · 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{2CO4PUM4Q7VBNWVRXC4VDGZTBM}

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	2026-05-18T04:27:36.524868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d09dc7d19c87ea16dab1b8b9519b330b0f02f03a78f82d8256472969a6515fee

Aliases

arxiv: 0806.0844 · arxiv_version: 0806.0844v2 · doi: 10.48550/arxiv.0806.0844 · pith_short_12: 2CO4PUM4Q7VB · pith_short_16: 2CO4PUM4Q7VBNWVR · pith_short_8: 2CO4PUM4

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/2CO4PUM4Q7VBNWVRXC4VDGZTBM \
  | 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: d09dc7d19c87ea16dab1b8b9519b330b0f02f03a78f82d8256472969a6515fee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04893b217ecf357a78f6df7cf33f18f4f9c330caa8b3f268dc5613d8b917b1cb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2008-06-04T19:48:02Z",
    "title_canon_sha256": "a107bb46e32fec65c77f585f91ca358f40855f2aa443e86cb5fa03f4264e0c67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.0844",
    "kind": "arxiv",
    "version": 2
  }
}