Real-world applications now deal with a massive amount of data, and information about the world is inaccurate, incomplete, or uncertain. Therefore, we present in our paper a proposed model for solving problems. This model is based on the class of locally generalized closed sets, namely, locally simply* alpha generalized closed* sets and locally simply* alpha generalized closed** sets (briefly,

The most recent Coronavirus epidemic was an outbreak in China at the start of 2019. China increased its national public-health response to the highest level on January 23, 2020. A variety of public social distancing initiatives to minimize the transmission rate of Corona virus have been introduced as part of the emergency response [

In diverse research areas, the mathematical modeling of vagueness and ambiguity has become an increasingly important topic. There exists another statistical instrument that has been utilized in many aspects of life [

Our aim in this paper is to introduce three new classes of sets called

Finally, we explain the importance of the proposed method in the medical sciences for application in decision making problems. In fact, a medical application has been introduced in the decision making process of COVID-19 Medical Diagnostic Information System with the algorithm. This application may help the world to reduce the spread of Coronavirus.

The paper is structured as follows: The basic concepts of the locally generalized closed set and locally simply*

In this section, the present study is inspired by pointing out locally generalized closed set blind spots.

Locally-closed [

Generalized locally closed [

In this section, we shall introduce a new class of generalization say

Simply alpha interior (shortly,

Simply alpha closure (briefly,

Simply

Simply

Locally

Locally simply

Locally simply

Locally simply*

The collection of all locally simply* alpha generalized closed set (resp. locally simply* alpha generalized closed* set, and locally simply* alpha generalized closed** set) of a universe set

(implication 3) A set

(implications 6, 7) A set

(implication 5, 1)

(implication 6, 2, 4)

(implication 8, 9, 10, 11) A set

g-closed sets and

There exist a set

There exists a set

There exist a set

There exists a set

There exists a set

There exists a set

There exists a set

There exists a set

There exists a set

The following example indicates this theorem;

From Example 2.1 we get that there exists a set

Let

i.e.,

In this section, we provide an application of our approaches for decision making for information systems on Coronavirus infections. Indeed, our approach identifies the critical factors for Coronavirus infection in humans. We find gatherings, contacting with injured people, and working in hospitals is the only factor determining the transmission of infection. We conclude that staying home and not having contact with humans protect against viral infection with the Coronavirus. According [

We would like to recall that the information obtained in this analysis of the Coronavirus is from 1000 patient. Because the attributes in rows (objects) were identical, it has been reduced to 10 patients. The application can be described as follows, where the objects as; _{1}, _{2}, ….., _{10}} denotes 10 listed patients, the features as _{1}, _{2}, ……, _{10}}={Difficulty breathing, Chest pain, Temperature, Dry coughs Headache, Loss of taste or smell} and Decision Coronavirus {

Objects | Serious symptoms | Most common symptoms | Decision | ||||
---|---|---|---|---|---|---|---|

Difficulty breathing | Chest pain | Temperature | Dry cough | Headache | Loss of taste or smell | ||

_{1} |
Yes | Yes | High | Yes | Yes | No | Yes |

_{2} |
Yes | Yes | High | Yes | Yes | No | Yes |

_{3} |
No | Yes | Normal | Yes | No | Yes | No |

_{4} |
No | Yes | Normal | No | No | No | No |

_{5} |
No | Yes | Normal | Yes | No | No | No |

_{6} |
Yes | No | High | Yes | Yes | No | Yes |

_{7} |
No | No | High | Yes | Yes | No | Yes |

_{8} |
No | No | Normal | Yes | Yes | No | No |

_{9} |
No | No | High | No | No | Yes | Yes |

_{10} |
No | No | High | Yes | Yes | No | Yes |

Objects | Attributes | Decision | |||||
---|---|---|---|---|---|---|---|

_{1} |
_{2} |
_{3} |
_{4} |
_{5} |
_{6} |
d | |

_{1} |
2 | 2 | 2 | 2 | 2 | 1 | 2 |

_{2} |
2 | 2 | 2 | 2 | 2 | 1 | 2 |

_{3} |
1 | 2 | 1 | 2 | 1 | 2 | 1 |

_{4} |
1 | 2 | 1 | 1 | 1 | 1 | 1 |

_{5} |
1 | 2 | 1 | 2 | 1 | 1 | 1 |

_{6} |
2 | 1 | 2 | 2 | 2 | 1 | 2 |

_{7} |
1 | 1 | 2 | 2 | 2 | 1 | 2 |

_{8} |
1 | 1 | 1 | 2 | 2 | 1 | 1 |

_{9} |
1 | 1 | 2 | 1 | 1 | 2 | 2 |

_{10} |
1 | 1 | 2 | 2 | 2 | 1 | 2 |

Note: We note that, _{1}_{1}, _{3}, _{4} and _{6} are indispensable. Also, we get _{2} removed then we obtain _{2}_{2,} _{5}.

Then, we get the removal of attributes as the next

Attributes (^{’}) |
Decision | ||||
---|---|---|---|---|---|

_{1} |
_{3} |
_{4} |
_{6} |
||

_{1} |
2 | 2 | 2 | 1 | 2 |

_{2} |
2 | 2 | 2 | 1 | 2 |

_{3} |
1 | 1 | 2 | 2 | 1 |

_{4} |
1 | 1 | 1 | 1 | 1 |

_{5} |
1 | 1 | 2 | 1 | 1 |

_{6} |
2 | 2 | 2 | 1 | 2 |

_{7} |
1 | 2 | 2 | 1 | 2 |

_{8} |
1 | 1 | 2 | 1 | 1 |

_{9} |
1 | 2 | 1 | 2 | 2 |

_{10} |
1 | 2 | 2 | 1 | 2 |

From

_{1}) = {_{1}, _{3}, _{4}}, _{2}) = {_{1}, _{3}, _{4}}, _{3}) = {_{4}, _{6}}, _{4}) = _{5}) = {_{4}}. Now, we can generate the following relation: _{i} _{j} ⇔ _{i}) ⊆ _{j}).

We apply this relation for all features in the table to induce the neighborhoods as follows.

_{1}, s_{1}_{1}, s_{2}_{2}, s_{2}_{2}, s_{1}_{3}, s_{3}_{4}, s_{4}_{4}, s_{1}), (_{4}, s_{2}_{4}, s_{3}_{4}, s_{5}_{5}, s_{5}_{5}, s_{1}_{5}, s_{2}_{r} s_{1 }= {_{1}, s_{2}_{r} s_{2} = {_{1}, s_{2}},

_{r} s_{3} = {_{3}}, _{r} s_{4 }=_{ }_{r} s_{5} = { _{1}, s_{2}_{3}, s_{5}_{1}, _{2}}, {_{3}}, {_{1}, _{2}. _{3}}, {_{1}, _{2}, _{3}, _{5}}}, ^{c} = {_{4}, _{5}}, {_{4}}, {_{5}, _{4}. _{3}}, {_{1}, _{2}, _{4}, _{5}}}.

Then, we construct the following

{_{1} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
{_{3} |
{_{3} |

{_{4} |
{_{4} |
- | - | ||||

{_{5}} |
{_{4}, s_{5}} |
- | - | ||||

{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |

{_{1}, s_{3}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{1}, s_{4}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{1}, s_{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{2}, s_{3}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{4}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{2}, s_{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | {_{3}, s_{4}} |
|||

{_{3}, s_{4}} |
{_{3}, s_{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | {_{3}, s_{4}} |

{_{3}, s_{5}} |
{_{3}, s_{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - |

{_{4}, s_{5}} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | |||

{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
- | {_{1}, s_{2}, _{3}} |
||||

{_{1}, s_{2}, _{4}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | {_{1}, s_{2}, _{4}} |

{_{1}, s_{2}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | {_{1}, s_{2}, _{5}} |

{_{1}, s_{3}, _{4}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{1}, s_{3}, _{5}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{3}, _{4}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{3}, _{5}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{3}, s_{4}, _{5}} |
{_{3}, s_{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | {_{3}, s_{4}, _{5}} |

{_{1}, s_{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}, _{4}} |
||||

{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
|||

{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | {_{1}, s_{2}} |
- |

{_{1}, s_{3}, _{4}, _{5}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{3}, _{4}, _{5}} |
{_{3} |
{_{3}, s_{4}, _{5}} |
{_{3} |
- | - |

Then the class of simply* alpha open set is

_{1}-Difficulty breathing is removed, the symptoms of every patient are: _{1}) = {_{3}, _{4}}, _{2}) = {_{3}, _{4}}, _{3}) = {_{4}, _{6}}, _{4}) = , and _{5}) = {_{4}}.

Thus, the right neighborhoods of each element in

Then the topology deduced from this relation is ^{c} = {_{3}, _{4}, _{5}}, {_{1}, _{2}, _{4}, _{5}}, {_{4}, _{5}}, {_{4}} }, and hence the class of simply* alpha open set of the whole is identical with the class of simply* alpha open set without the symptom _{1}; this means that

_{3}-Temperature is removed, the symptoms of every patient are: _{1}) = {_{1}, _{4}}, _{2}) = {_{1}, _{4}}, _{3}) = {_{1}, _{4}, _{6}}, _{4}) = {_{1}}, and _{5}) = {_{1}, _{4}}.

Thus, the right neighborhoods of each element in

_{r}(_{1}) = {_{1}, _{2}, _{3}}, _{r}(_{2}) = {_{1}, _{2}, _{3}}, _{r}(_{3}) = {_{3}}, _{r}(_{4}) = {_{1}, _{2}, _{3}, _{4}}, and _{r}(_{5}) = {_{1}, _{2}, _{3}, _{5}}. Then, the topology deduced from this relation is _{1}, _{2}, _{3}}, {_{1}, _{2}, _{3}, _{4}}, {_{1}, _{2}, _{3}, _{5}}}, ^{c} = {_{4}, _{5}}, {_{5}}, {_{4}} }, and hence the class of simply* alpha open set of the whole is not identical with the class of simply* alpha open set without the symptom _{3}, if

{_{1} |
- | - | |||||

{_{2}} |
- | - | |||||

{_{3} |
- | - | |||||

{_{4} |
{_{4} |
- | - | ||||

{_{5}} |
{_{5}} |
- | - | ||||

{_{1}, s_{2}} |
- | - | |||||

{_{1}, s_{3}} |
- | - | |||||

{_{1}, s_{4}} |
- | - | |||||

{_{1}, s_{5}} |
- | - | |||||

{_{2}, s_{3}} |
- | - | |||||

{_{2}, s_{4}} |
- | - | |||||

{_{2}, s_{5}} |
- | - | |||||

{_{3}, s_{4}} |
- | - | |||||

{_{3}, s_{5}} |
- | - | |||||

{_{4}, s_{5}} |
{_{4}, _{5}} |
- | - | ||||

{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
||||

{_{1}, s_{2}, _{4}} |
{_{1}, s_{2}} |
- | - | ||||

{_{1}, s_{2}, _{5}} |
{_{1}, s_{2}} |
- | - | ||||

{_{1}, s_{3}, _{4}} |
{_{3} |
- | - | ||||

{_{1}, s_{3}, _{5}} |
{_{3} |
- | - | ||||

{_{2}, s_{3}, _{4}} |
{_{3} |
- | - | ||||

{_{2}, s_{3}, _{5}} |
{_{3} |
- | - | ||||

{_{2}, s_{4}, _{5}} |
- | - | |||||

{_{3}, s_{4}, _{5}} |
{_{3} |
- | - | ||||

{_{1}, s_{4}, _{5}} |
- | - | |||||

{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}, _{4}} |
||||

{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
||||

{_{1}, s_{2}, _{4}, _{5}} |
- | - | |||||

{_{1}, s_{3}, _{4}, _{5}} |
- | - | |||||

{_{2}, s_{3}, _{4}, _{5}} |
- | - |

_{4}-Dry cough is removed, the symptoms of every patient are:

Thus, the right neighborhoods of each element in U of this relation are _{r}(_{1}) = {_{1}, _{2}}, _{r}(_{2}) = {_{1}, _{2}}, _{r}(_{3}) = {_{3}}, _{r}(_{4}) = _{r}(_{5}) =

Then the topology deduced from this relation is _{1}, _{2}}, {_{3}}, {_{1}, _{2}, _{3}}}, ^{c} = {_{3}, _{4}, _{5}}, {_{1}, _{2}, _{4}, _{5}}, {_{4}, _{5}}}, and hence the class of simply* alpha open set of the whole is identical with the class of simply* alpha open set without the symptom _{4}, this means that

{_{1} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
{_{3} |
{_{3} |

{_{4} |
{_{4}, _{5}} |
- | - | ||||

{_{5}} |
{_{4}, _{5}} |
- | - | ||||

{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |

{_{1}, s_{3}} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - | ||

{_{1}, s_{4}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{1}, s_{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{2}, s_{3}} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{4}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{2}, s_{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{3}, s_{4}} |
{_{3}, _{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | {_{3}, s_{4}} |

{_{3}, s_{5}} |
{_{3}, _{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | {_{3}, s_{5}} |

{_{4}, s_{5}} |
{_{4}, _{5}} |
- | - | ||||

{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
||||

{_{1}, s_{2}, _{4}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | {_{1}, s_{2}, _{4}} |

{_{1}, s_{2}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | {_{1}, s_{2}, _{5}} |

{_{1}, s_{3}, _{4}} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - | ||

{_{1}, s_{3}, _{5}} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{3}, _{4}} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{3}, _{5}} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - | ||

{_{2}, s_{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{3}, s_{4}, _{5}} |
{_{3}, _{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
- | - |

{_{1}, s_{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}, _{4}} |
||||

{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
||||

{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
- | {_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |

{_{1}, s_{3}, _{4}, _{5}} |
{_{3}} |
{_{3}} |
- | {_{3}, _{4}, _{5}} |
- | ||

{_{2}, s_{3}, _{4}, _{5}} |
{_{3}} |
- | {_{3}, _{4}, _{5}} |
- |

_{6}-Loss of taste or smell is removed, the symptoms of every patient are: _{1}) = {_{1}, _{3}}, _{2}) = {_{1}, _{3}}, _{3}) = {_{1}, _{6}}, _{4}) = {_{1}}, and _{5}) = {_{1}}.

Thus, the right neighborhoods of each element in _{r}(_{1}) = {_{1}, _{2}}, _{r}(_{2}) = {_{1}, _{2}}, _{r}(_{3}) = {_{3}}, _{r}(_{4}) = _{r}(_{5}) =

Then the topology deduced from this relation is _{1}, _{2}}, {_{3}}, {_{1}, _{2}, _{3}}}, ^{c} = {_{3}, _{4}, _{5}}, {_{1}, _{2}, _{4}, _{5}}, {_{4}, _{5}}}, and hence the class of simply* alpha open set of the whole is not identical with the class of simply* alpha open set without the symptom _{6}-Loss of taste or smell this means that

{_{1} |
- | - | |||||

{_{2}} |
- | - | |||||

{_{3} |
{_{3}, _{4}, _{5}} |
{_{3} |
{_{3} |
{_{3}, _{4}, _{5}} |
- | - | |

{_{4} |
{_{4}} |
- | - | ||||

{_{5}} |
{_{3}, _{4}, _{5}} |
- | - | ||||

{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
{_{1}, s_{2}} |
||||

{_{1}, s_{3}} |
- | - | |||||

{_{1}, s_{4}} |
- | - | |||||

{_{1}, s_{5}} |
- | - | |||||

{_{2}, s_{3}} |
- | - | |||||

{_{2}, s_{4}} |
- | - | |||||

{_{2}, s_{5}} |
- | - | |||||

{_{3}, s_{4}} |
{_{3}, _{4}, _{5}} |
- | - | ||||

{_{3}, s_{5}} |
{_{3}, _{4}, _{5}} |
- | - | ||||

{_{4}, s_{5}} |
{_{3}, _{4}, _{5}} |
- | - | ||||

{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}} |
||||

{_{1}, s_{2}, _{4}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}} |
{_{1}, s_{2}, _{4}} |
||||

{_{1}, s_{2}, _{5}} |
{_{1}, s_{2}, _{5}} |
{_{1}, s_{2}, _{5}} |
|||||

{_{1}, s_{3}, _{4}} |
- | - | |||||

{_{1}, s_{3}, _{5}} |
- | - | |||||

{_{2}, s_{3}, _{4}} |
- | - | |||||

{_{2}, s_{3}, _{5}} |
- | - | |||||

{_{2}, s_{4}, _{5}} |
- | - | |||||

{_{3}, s_{4}, _{5}} |
{_{3}, _{4}, _{5}} |
- | - | ||||

{_{1}, s_{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
- | - | |||

{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}, _{4}} |
{_{1}, s_{2}, _{3}, _{4}} |
||||

{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}} |
{_{1}, s_{2}, _{3}, _{5}} |
{_{1}, s_{2}, _{3}, _{5}} |
||||

{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}} |
{_{1}, s_{2}, _{4}, _{5}} |
{_{1}, s_{2}, _{4}, _{5}} |
||||

{_{1}, s_{3}, _{4}, _{5}} |
- | - | |||||

{_{2}, s_{3}, _{4}, _{5}} |
- | - |

Hence, from Steps (1–3), we observe that: the CORE is {_{3}, _{6}}, that is the impact factors to determine Coronavirus infection are High Temperature and Loss of taste or smell.

Our study in this article aims for defining a new type of simply* alpha generalized namely Simply*