Zikai Xiong

Past Awards

2025
George B. Dantzig Dissertation Award: Second Place
Winning material: New Theory and New Practical Methods for Solving Large-Scale Linear and Conic Optimization
Optimization Society Student Paper Prize: Winner(s)
Winning material: Accessible Theoretical Complexity of the Restarted Primal-Dual Hybrid Gradient Method for Linear Programs with Unique Optima


2024
George Nicholson Student Paper Competition: Finalist
Optimization Society Student Paper Prize: Honorable Mention
Winning material: Computational Guarantees for Restarted PDHG for LP Based on "Limiting Error Ratios" and LP Sharpness


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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
compact(): Undefined variable: fe_array_31f157105db0df114e7bce556dc83971_6 in /var/www/ez5/ezpublish_legacy/var/ezflow_site/cache/template/compiled/left_nav_main_item-5f49afdc3f856d2818ac91d4f2e4f3e3.php on line 194
Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
compact(): Undefined variable: fe_max_31f157105db0df114e7bce556dc83971_6 in /var/www/ez5/ezpublish_legacy/var/ezflow_site/cache/template/compiled/left_nav_main_item-5f49afdc3f856d2818ac91d4f2e4f3e3.php on line 194
Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
compact(): Undefined variable: fe_first_val_31f157105db0df114e7bce556dc83971_6 in /var/www/ez5/ezpublish_legacy/var/ezflow_site/cache/template/compiled/left_nav_main_item-5f49afdc3f856d2818ac91d4f2e4f3e3.php on line 194
Notice: PHP: E_NOTICE Jan 30 2026 14:03:17
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Timing: Jan 30 2026 14:03:17
Script end
Notice: Jan 30 2026 14:03:17
eZTemplate: Loading template "setup/debug_toolbar.tpl" with resource "design"

Main resources:

Total runtime0.2527 sec
Peak memory usage2,048.0000 KB
Database Queries531

Timing points:

CheckpointStart (sec)Duration (sec)Memory at start (KB)Memory used (KB)
Script start 0.00000.0041 607.3750239.8984
Module start 'content' 0.00410.0456 847.27341,089.9375
Module end 'content' 0.04970.2028 1,937.21094,942.2422
Script end 0.2526  6,879.4531 

Time accumulators:

 Accumulator Duration (sec) Duration (%) Count Average (sec)
Ini load
Load cache0.00160.6448330.0000
Check MTime0.00080.3289330.0000
Mysql Total
Database connection0.00160.638810.0016
Mysqli_queries0.217285.96605310.0004
Looping result0.00240.95085120.0000
Template Total0.235693.330.0785
Template load0.00110.423630.0004
Template processing0.234692.835830.0782
Template load and register function0.00000.005910.0000
states
state_id_array0.00923.6374330.0003
state_identifier_array0.00963.8170340.0003
Override
Cache load0.00080.3177150.0001
Sytem overhead
Fetch class attribute name0.00180.7186120.0002
Fetch class attribute can translate value0.00140.555760.0002
class_abstraction
Instantiating content class attribute0.00000.0060160.0000
XML
Image XML parsing0.00030.116060.0000
General
dbfile0.00050.1856160.0000
String conversion0.00000.001630.0000
Note: percentages do not add up to 100% because some accumulators overlap

Time used to render debug report: 0.0003 secs