## What is a tractable function?

So-called easy, or tractable, problems can be solved by computer algorithms that run in polynomial time; i.e., for a problem of size n, the time or number of steps needed to find the solution is a polynomial function of n. Algorithms for solving hard, or intractable, problems, on… In P versus NP problem.

**Is O 2 N tractable?**

O(1), O(log n), O(n), O(n log n), O(n2), and O(nk) are all tractable.

### What does tractable mean in statistics?

From this perspective, a definition for tractable distribution is that it takes polynomial-time to calculate the probability of this distribution at any given point.

**What is non tractable problem?**

Intractable Problem: a problem that cannot be solved by a polynomial-time algorithm. The lower bound is exponential. From a computational complexity stance, intractable problems are problems for which there exist no efficient algorithms to solve them.

## What is a tractable model?

1. A ‘tractable’ model is one that you can solve, which means there are several types of tractability : analytical tractability (finding a solution to a theoretical model), empirical tractability (being able to estimate/calibrate your model) and computational tractability (finding numerical solutions).

**What does tractable model mean?**

A ‘tractable’ model is one that you can solve, which means there are several types of tractability : analytical tractability (finding a solution to a theoretical model), empirical tractability (being able to estimate/calibrate your model) and computational tractability (finding numerical solutions).

### Is NP hard tractable?

All tractable decision problems are in NP, plus a lot of problems whose difficulty is unknown. (intuitively) the hardest problems in NP. tractable.

**How do you know if a problem is undecidable?**

An undecidable problem is one that should give a “yes” or “no” answer, but yet no algorithm exists that can answer correctly on all inputs.

## Can undecidable problems be in NP?

An NP-hard is a problem that is at least as hard as any NP-complete problem. Therefore an undecidable problem can be NP-hard. A problem is NP-hard if an oracle for it would make solving NP-complete problems easy (i.e. solvable in polynomial time).

**What is tractable in machine learning?**

Problem tractability refers to the concept that a proposed problem can actually be solved using machine learning methods.

### What does intractable mean mean?

not easily governed, managed

Definition of intractable 1 : not easily governed, managed, or directed intractable problems. 2 : not easily relieved or cured intractable pain. 3 : not easily manipulated or shaped intractable metal.

**What makes something undecidable?**

## What is an undecidable problem example?

Examples – These are few important Undecidable Problems: Whether a CFG generates all the strings or not? As a CFG generates infinite strings, we can’t ever reach up to the last string and hence it is Undecidable.

**What does mathematically tractable mean?**

(mathematics) Sufficiently operationalizable or useful to allow a mathematical calculation to proceed toward a solution. quotations ▼ (computer science, of a decision problem) Algorithmically solvable fast enough to be practically relevant, typically in polynomial time.