FPT is characterized by useful obstruction sets

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

FPT Is Characterized by Useful Obstruction Sets

Many graph problems were first shown to be fixed-parameter tractable using the results of Robertson and Seymour on graph minors. We show that the combination of finite, computable, obstruction sets and efficient order tests is not just one way of obtaining strongly uniform FPT algorithms, but that all of FPT may be captured in this way. Our new characterization of FPT has a strong connection to...

متن کامل

Sets characterized by missing sums and differences

A more sums than differences (MSTD) set is a finite subset S of the integers such |S + S| > |S− S|. We show that the probability that a uniform random subset of {0, 1, . . . , n} is an MSTD set approaches some limit ρ > 4.28× 10−4. This improves the previous result of Martin and O’Bryant that there is a lower limit of at least 2 × 10−7. Monte Carlo experiments suggest that ρ ≈ 4.5× 10−4. We pre...

متن کامل

Is Meconium Obstruction Distinguishable from Intestinal Obstruction through Ultrasound?

Background: Since the treatment of meconium ileus is very different from other types of intestinal obstruction, it is very important to distinguish these two entities. The aim of this study was to assess sonographic findings to differentiate meconium ileus from other types of obstruction. Methods: This study was performed in Dr. Sheikh and Akbar hospitals, Mashhad Medical University of Science...

متن کامل

Obstructive Sleep Apnea Syndrome (osas) Is Characterized by Periodic Complete or Partial Upper Airway Obstruction

OBSTRUCTIVE SLEEP APNEA SYNDROME (OSAS) IS CHARACTERIZED BY PERIODIC COMPLETE OR PARTIAL UPPER AIRWAY OBSTRUCTION DURING SLEEP, causing intermittent cessation of breathing (apneas) or reductions in airflow (hypopneas). These episodes of apnea and hypopnea cause sleep fragmentation and repetitive hypoxemia, which leads to excessive daytime sleepiness, neurocognitive impairment, increased risk fo...

متن کامل

Thyroxin Is Useful to Improve Sperm Motility

Objective The aim of this study was to evaluate the non-genomic action of thyroxin on sperm kinetic and its probable use to improve sperm recovery after applying an enrichment method like “swim-up” in comparison with the available one, pentoxifylline. MaterialsAndMethods This is an experimental study. A total of 50 patients were recruited, followed by infertility consultation. Conventional sper...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: ACM Transactions on Computation Theory

سال: 2014

ISSN: 1942-3454,1942-3462

DOI: 10.1145/2635820