Pith Number

pith:42FWSGNW

pith:2021:42FWSGNWV5VFBRURSWA3PJ6BTS

not attested not anchored not stored refs pending

Vertical, Temporal, and Horizontal Scaling of Hierarchical Hypersparse GraphBLAS Matrices

Albert Reuther, Andrew Prout, Anna Klein, Antonio Rosa, Chansup Byun, Charles Yee, David Bestor, Jeremy Kepner, Julie Mullen, Lauren Milechin, Matthew Hubbell, Michael Houle, Michael Jones, Peter Michaleas, Siddharth Samsi, Tim Davis, Vijay Gadepally, William Arcand, William Bergeron

arxiv:2108.06650 v1 · 2021-08-15 · cs.DC · cs.DM · cs.MS · cs.NI · cs.PF

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42FWSGNWV5VFBRURSWA3PJ6BTS}

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	2026-07-05T03:41:26.361056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e68b6919b6af6a50c6919581b7a7c19c8f989415ec1563dbe0c0e3f354888fea

Aliases

arxiv: 2108.06650 · arxiv_version: 2108.06650v1 · doi: 10.48550/arxiv.2108.06650 · pith_short_12: 42FWSGNWV5VF · pith_short_16: 42FWSGNWV5VFBRUR · pith_short_8: 42FWSGNW

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/42FWSGNWV5VFBRURSWA3PJ6BTS \
  | 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: e68b6919b6af6a50c6919581b7a7c19c8f989415ec1563dbe0c0e3f354888fea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a34dd943a54afe5eb57dfb4ba8983a7530cd203e6c722df4f5a2ede33804e52c",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.MS",
      "cs.NI",
      "cs.PF"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DC",
    "submitted_at": "2021-08-15T03:02:21Z",
    "title_canon_sha256": "a6357b5c5b67c664c6563675494df1309c4ceae67b1512e22e573b27d3e94dad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.06650",
    "kind": "arxiv",
    "version": 1
  }
}