Pith Number

pith:OMRUHIGX

pith:2026:OMRUHIGX4JIXU6FYA5RV74ZN5R

not attested not anchored not stored refs pending

A Semismooth Newton Augmented Lagrangian Method for Sparse Spectral Risk Optimization

Defeng Sun, Rufeng Xiao, Rujun Jiang, Xudong Li

arxiv:2607.05991 v1 · 2026-07-07 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OMRUHIGX4JIXU6FYA5RV74ZN5R}

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	2026-07-08T01:18:52.616904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

732343a0d7e2517a78b807635ff32dec663f2211148d846395434ec1b2a1ff79

Aliases

arxiv: 2607.05991 · arxiv_version: 2607.05991v1 · doi: 10.48550/arxiv.2607.05991 · pith_short_12: OMRUHIGX4JIX · pith_short_16: OMRUHIGX4JIXU6FY · pith_short_8: OMRUHIGX

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/OMRUHIGX4JIXU6FYA5RV74ZN5R \
  | 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: 732343a0d7e2517a78b807635ff32dec663f2211148d846395434ec1b2a1ff79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4aac56acbcc6b9c03c52f7a85459ee1083aef683b3cc90bbba50783f81232fe7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2026-07-07T08:23:24Z",
    "title_canon_sha256": "912343786aab52e27a4f40b4d69119876592d836696c196bd59fbf2134bff69c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.05991",
    "kind": "arxiv",
    "version": 1
  }
}