Pith Number

pith:BT72ZORA

pith:2013:BT72ZORAFQNCUZV4C4MI2BQAOU

not attested not anchored not stored refs pending

Development of a finite element firn densification model for converting volume changes to mass changes

Douglas Brinkerhoff, Evan Cummings, Jesse Johnson

arxiv:1308.6616 v1 · 2013-08-29 · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BT72ZORAFQNCUZV4C4MI2BQAOU}

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	2026-05-18T03:14:38.634264Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0cffacba202c1a2a66bc17188d060075296fc68d585eddeede522f8625afb1a2

Aliases

arxiv: 1308.6616 · arxiv_version: 1308.6616v1 · doi: 10.48550/arxiv.1308.6616 · pith_short_12: BT72ZORAFQNC · pith_short_16: BT72ZORAFQNCUZV4 · pith_short_8: BT72ZORA

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/BT72ZORAFQNCUZV4C4MI2BQAOU \
  | 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: 0cffacba202c1a2a66bc17188d060075296fc68d585eddeede522f8625afb1a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c21a9ddadf74366911b7dcc76637f5a19456a7bfce10011f08d528255752e84",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2013-08-29T21:35:55Z",
    "title_canon_sha256": "aa4b6feaab69ecce9c49064739a64479b4e771ad2dff0471fb3bea8409aa1d2a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.6616",
    "kind": "arxiv",
    "version": 1
  }
}