The sentence "have three steps" is correct and usable in written English.
It can be used to describe something that requires three steps to complete. For example: "Cleaning the kitchen can be a daunting task, but it is simple if you have three steps to follow."
In order to solve (3.23) we have three steps: first we choose the type of derivative and change problem (3.23) to a system of ODE by using Theorem 2.2 and considering initial values.
Anti-entropy session have three steps, in the first step, A transmit it summary vector to B. If B has no idol channel, it will neglect the summary vector.
Conformity tests have three steps: (1) the derivation of tests scenarios which aims to generate abstract test scenarios on the basis of the protocol specification, (2) allows the implementation of test scenarios in order to make them executable for a particular implementation, and (3) apply the implemented test scenarios in order to determine the conformity verdict.
The classical approaches for WGS de novo assembly have three steps: overlap, layout and consensus (OLC).
Current signal analysis methods typically have three steps: build literature based preliminary signaling pathways model; generate gene expression experimental data; detect the shortest path as the specific signal and verify biological meaning.
Defense and developmental processes usually have three steps: recognition of signaling (biotic and abiotic stimulus for stress or hormones for development), signal transduction, and the expression of target genes.
Conceivability arguments for haecceitism have two steps.
"The water is up to the first step of our front door, we have two steps.
To recognize a face (or any object), many vision algorithms have two steps.
We have two steps going into the vocal room where I record.
"It isn't a house that has three steps here, and four steps there," Mr. Graves said.
