Pith Number

pith:WPECQVSV

pith:2015:WPECQVSVXPGVAIXQ2IMNTKIL45

not attested not anchored not stored refs pending

Directional H2-matrix compression for high-frequency problems

Steffen B\"orm

arxiv:1510.07087 v5 · 2015-10-23 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WPECQVSVXPGVAIXQ2IMNTKIL45}

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	2026-05-18T00:42:13.480495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3c8285655bbcd5022f0d218d9a90be740650a36952793f4f3556a7789a3ee41

Aliases

arxiv: 1510.07087 · arxiv_version: 1510.07087v5 · doi: 10.48550/arxiv.1510.07087 · pith_short_12: WPECQVSVXPGV · pith_short_16: WPECQVSVXPGVAIXQ · pith_short_8: WPECQVSV

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/WPECQVSVXPGVAIXQ2IMNTKIL45 \
  | 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: b3c8285655bbcd5022f0d218d9a90be740650a36952793f4f3556a7789a3ee41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a58f324e7699e8e9844cf1dbdc79ffcd842153597aca0e1baf65ff8215e391a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-10-23T23:37:51Z",
    "title_canon_sha256": "095f5df6a3972087b8772eca07a467665b78880f54e82aa124df9660f41fbd14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.07087",
    "kind": "arxiv",
    "version": 5
  }
}