Pith Number

pith:OGEWIDFP

pith:2011:OGEWIDFPUUK446SEKIBELCUH4A

not attested not anchored not stored refs pending

Unimpeded permeation of water through helium-leak-tight graphene-based membranes

A. K. Geim, H. A. Wu, I. V. Grigorieva, P. N. Jayaram, R. R. Nair

arxiv:1112.3488 v1 · 2011-12-15 · cond-mat.mtrl-sci · cond-mat.mes-hall · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OGEWIDFPUUK446SEKIBELCUH4A}

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	2026-05-18T04:03:44.974144Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7189640cafa515ce7a445202458a87e006de2a268d42e526ab1affb4a0ad30f5

Aliases

arxiv: 1112.3488 · arxiv_version: 1112.3488v1 · doi: 10.48550/arxiv.1112.3488 · pith_short_12: OGEWIDFPUUK4 · pith_short_16: OGEWIDFPUUK446SE · pith_short_8: OGEWIDFP

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/OGEWIDFPUUK446SEKIBELCUH4A \
  | 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: 7189640cafa515ce7a445202458a87e006de2a268d42e526ab1affb4a0ad30f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d11107086fbb7c00b67c12d82cab9319be38a631daa95ac453dfe203ec162a22",
    "cross_cats_sorted": [
      "cond-mat.mes-hall",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2011-12-15T11:39:57Z",
    "title_canon_sha256": "26279e70d3340a16de77b9dd81459a2d5788252dab3b13acc7f6640857507137"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.3488",
    "kind": "arxiv",
    "version": 1
  }
}