Pith Number

pith:H7WEJXT4

pith:2026:H7WEJXT4SYXIACUAM7PYYNYOKD

not attested not anchored not stored refs pending

Negative Thermal Expansion in Cubic Ice: A Collective Quantum Effect of the hydrogen-bond network

A. Marco Saitta, Livia Eleonora Bove, Loan Renaud, Michele Casula, Richard Gaal, Tomasz Poreba

arxiv:2607.28244 v1 · 2026-07-30 · 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{H7WEJXT4SYXIACUAM7PYYNYOKD}

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	2026-07-31T01:36:54.495790Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

3fec44de7c962e800a8067df8c370e50f748382d21857114c421130c78dcd6af

Aliases

arxiv: 2607.28244 · arxiv_version: 2607.28244v1 · doi: 10.48550/arxiv.2607.28244 · pith_short_12: H7WEJXT4SYXI · pith_short_16: H7WEJXT4SYXIACUA · pith_short_8: H7WEJXT4

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/H7WEJXT4SYXIACUAM7PYYNYOKD \
  | 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: 3fec44de7c962e800a8067df8c370e50f748382d21857114c421130c78dcd6af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15b0689455b90b3f2e9b246841a6289cceefec55fac05e3a8830b9c5347040bf",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2026-07-30T14:06:56Z",
    "title_canon_sha256": "9e6a92ce4a630179c693ce0e2df6ee5ca90e61b3ae3778f8de8a218d2d8ab0a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.28244",
    "kind": "arxiv",
    "version": 1
  }
}